# SizeMarker > SizeMarker (https://www.sizemarker.com) is a precise dimension & spec annotation tool. It adds accurate dimensions, spec labels, focus spotlights, callouts, and contour lines to product photos, so buyers see exact sizes and details before they order — cutting pre-sale size questions and size-driven returns for foreign-trade B2B suppliers (furniture, industrial, building materials) and e-commerce sellers. Key facts: - Measurements are drawn with deterministic geometry, so marked dimensions stay accurate; AI assists with placement but never guesses numbers — unlike AI image generators, which restyle photos but cannot mark true sizes. - Scope: buyer-facing spec diagrams, not CAD or engineering drafting. - Annotation types: dimension, label, focus, marketing callout, contour. Coordinates are normalized (0-1) so annotations survive image resize and zoom. - Runs in the browser, free to start, no install required; a desktop app is also available. - Available in 12 languages: en, zh-cn, zh-tw, ja, ko, es, pt, fr, de, th, id, fil. - Pricing (USD): Free plan $0; Pro $19.90/month or $118.80/year; Enterprise $29.90/seat/month or $178.80/seat/year. ## Core pages - [Home](https://www.sizemarker.com/): product overview, features, and pricing - [Pricing](https://www.sizemarker.com/pricing): Free, Pro, and Enterprise plans with prices and what each plan includes - [Site map](https://www.sizemarker.com/sitemap): full index of tools, comparisons, guides and the dimension reference library - [Return cost calculator](https://www.sizemarker.com/tools/return-calculator): free tool to estimate what product returns cost per order and per month - [Spec sheet scenario](https://www.sizemarker.com/scenarios/spec-sheet): how suppliers turn product photos into buyer-ready spec diagrams - [Furniture spec diagram maker](https://www.sizemarker.com/scenarios/furniture-spec-diagram): mark furniture width, depth, height, packed size, materials and weight capacity from a photo to prevent size returns - [Industrial spec diagram maker](https://www.sizemarker.com/scenarios/industrial-spec-diagram): mark equipment dimensions, port positions and technical specs B2B buyers can quote from, no CAD required - [Building material spec diagram maker](https://www.sizemarker.com/scenarios/building-material-spec-diagram): mark tile, panel and profile size, thickness and coverage from a photo - [Best tools to add dimensions to product photos](https://www.sizemarker.com/best-tools-to-add-dimensions-to-product-photos): honest comparison of SizeMarker vs Canva, Photoshop, Photopea, Figma, Snagit and Google Drawings for marking dimensions and specs on product photos - [Best spec sheet software for exporters](https://www.sizemarker.com/best-spec-sheet-software-for-exporters): 7 tools compared for building export spec sheets — Excel/Word for the data table, SizeMarker for dimension-accurate spec diagrams, plus Canva, Photopea, Affinity, Visme and Specright - [SizeMarker vs Canva](https://www.sizemarker.com/sizemarker-vs-canva): side-by-side comparison for adding accurate dimensions and specs to product photos - [SizeMarker vs Photoshop](https://www.sizemarker.com/sizemarker-vs-photoshop): side-by-side comparison for adding accurate dimensions and specs to product photos - [SizeMarker vs AI image generators](https://www.sizemarker.com/sizemarker-vs-ai-image-generators): why generative AI image tools cannot mark accurate dimensions, and when to use each - [Ecommerce returns & size statistics](https://www.sizemarker.com/ecommerce-returns-size-statistics): 30 sourced statistics on return rates, size/fit as the top return reason, and how images and specs affect buying - [Standard product dimensions reference](https://www.sizemarker.com/dimensions): sourced standard-size charts (furniture, logistics, building materials) in metric and imperial, from ISO/ANSI/EN and established industry standards - [Standard sofa dimensions](https://www.sizemarker.com/dimensions/standard-sofa-dimensions): standard sofa sizes by type (loveseat, 3-seat, 4-seat, sectional) in cm and inches - [Standard dining table dimensions](https://www.sizemarker.com/dimensions/standard-dining-table-dimensions): dining table size by number of seats, plus standard height and clearance - [Standard mattress sizes](https://www.sizemarker.com/dimensions/standard-mattress-sizes): US, UK and EU bed sizes in inches and centimetres, and why the same name differs by region - [Standard pallet sizes](https://www.sizemarker.com/dimensions/standard-pallet-sizes): ISO 6780 and regional pallet dimensions (GMA 48x40, Euro EPAL 1200x800, Asian, Australian) - [Shipping container dimensions](https://www.sizemarker.com/dimensions/shipping-container-dimensions): ISO 668 external and internal size, volume and payload for 20ft, 40ft and High Cube - [Standard door sizes](https://www.sizemarker.com/dimensions/standard-door-sizes): US and UK/EU interior and exterior door dimensions and thickness - [Standard desk dimensions](https://www.sizemarker.com/dimensions/standard-desk-dimensions): desk height, width and depth by type, plus ANSI/BIFMA sit-stand ranges and OSHA legroom - [Standard bookshelf dimensions](https://www.sizemarker.com/dimensions/standard-bookshelf-dimensions): bookcase width, depth, height and shelf spacing (IKEA Billy + library shelving) - [Standard wardrobe dimensions](https://www.sizemarker.com/dimensions/standard-wardrobe-dimensions): single/double/triple widths, hanging depth and long-hang vs double-hang rail heights (IKEA PAX) - [Standard office chair dimensions](https://www.sizemarker.com/dimensions/standard-office-chair-dimensions): BIFMA G1 seat, backrest and armrest adjustment ranges in cm and inches - [Standard coffee table dimensions](https://www.sizemarker.com/dimensions/standard-coffee-table-dimensions): height, size by shape and the two-thirds-of-sofa pairing rule - [Standard steel drum dimensions](https://www.sizemarker.com/dimensions/standard-steel-drum-dimensions): 55-gallon / 200L drum diameter and height, plus 30 and 16-gal, per ISO 15750 - [Standard IBC tote dimensions](https://www.sizemarker.com/dimensions/standard-ibc-tote-dimensions): 1000L / 275-gallon caged tote footprint and height from Schutz and Mauser datasheets - [Standard corrugated box sizes](https://www.sizemarker.com/dimensions/standard-carton-box-sizes): FEFCO 0201 RSC box styles, A-F flute grades, and USPS/Amazon FBA box size limits - [Standard tile sizes](https://www.sizemarker.com/dimensions/standard-tile-sizes): ceramic and porcelain formats, thickness by use and nominal vs actual sizing (ISO 13006) - [Standard plywood sheet sizes](https://www.sizemarker.com/dimensions/standard-plywood-sheet-sizes): 4x8 ft and metric panels, thickness nominal vs actual (a 3/4-in sheet is 23/32 in), per APA - [Dimensional lumber sizes](https://www.sizemarker.com/dimensions/dimensional-lumber-sizes): nominal vs actual softwood sizes (a 2x4 is 1.5 x 3.5 in / 38 x 89 mm) per US PS 20 - [Standard brick dimensions](https://www.sizemarker.com/dimensions/standard-brick-dimensions): US, UK/EU, China and India brick sizes, and the nominal vs specified/actual distinction - [Standard stair dimensions](https://www.sizemarker.com/dimensions/standard-stair-dimensions): rise, run/going, width and headroom limits by US IRC and UK Approved Document K - [Standard countertop dimensions](https://www.sizemarker.com/dimensions/standard-countertop-dimensions): counter height, depth, slab thickness, backsplash and quartz slab sizes (NKBA) - [Standard bed frame dimensions](https://www.sizemarker.com/dimensions/standard-bed-frame-dimensions): US Twin–Cal King, UK & IKEA EU bed sizes, frame-vs-mattress margin, headboard heights - [Standard TV stand dimensions](https://www.sizemarker.com/dimensions/standard-tv-stand-dimensions): match stand width to TV size, media console depth 13.75–18.5 in, 42 in seated eye-level - [Standard nightstand dimensions](https://www.sizemarker.com/dimensions/standard-nightstand-dimensions): 18–30 in wide, 12–30 in deep, 23–29 in tall matched to the mattress top - [Standard export wooden crate dimensions](https://www.sizemarker.com/dimensions/standard-wooden-crate-dimensions): weight classes, ASTM D6039 4,000 lb limit, ISPM-15 marking, pallet-matched bases - [Standard bulk bag (FIBC) dimensions](https://www.sizemarker.com/dimensions/standard-bulk-bag-dimensions): 35×35–42×42 in bases, SWL 5:1/6:1 safety factor, ISO 21898, U-panel/circular/baffle types - [Standard gaylord box dimensions](https://www.sizemarker.com/dimensions/standard-gaylord-box-dimensions): 48×40 in GMA-pallet footprint, wall count vs capacity (500–2,500+ lb) - [Standard window sizes](https://www.sizemarker.com/dimensions/standard-window-sizes): US size codes (2846, 3050), casement & sliding, UK/EU metric, nominal vs rough opening - [Standard drywall sheet sizes](https://www.sizemarker.com/dimensions/standard-drywall-sheet-sizes): 4×8/4×10/4×12 ft, thickness 1/4–5/8 in, EN 520 metric, panel weights (ASTM C1396) - [Standard dresser dimensions](https://www.sizemarker.com/dimensions/standard-dresser-dimensions): horizontal 50–70 in, tallboy 24–40 in wide × 40–60 in tall, 18–24 in deep, plus dresser-vs-TV width rule - [Standard dining chair dimensions](https://www.sizemarker.com/dimensions/standard-dining-chair-dimensions): seat 18 in high, 16–20 in wide, 15–18 in deep, 10–12 in table clearance, 24–26 in per person - [Standard bar stool dimensions](https://www.sizemarker.com/dimensions/standard-bar-stool-dimensions): counter-height 24–26 in vs bar-height 28–32 in seats, 10–12 in clearance, stool spacing - [Standard kitchen cabinet dimensions](https://www.sizemarker.com/dimensions/standard-kitchen-cabinet-dimensions): base 34.5 in tall / 24 in deep, wall 12–42 in, pantry 84–96 in, 3-in width increments, IKEA SEKTION metric - [Standard bathroom vanity dimensions](https://www.sizemarker.com/dimensions/standard-bathroom-vanity-dimensions): 32 in standard vs 34–36 in comfort height, 21 in depth, 24–72 in single/double widths - [Standard crib dimensions](https://www.sizemarker.com/dimensions/standard-crib-dimensions): US full-size interior 28 × 52 3/8 in (16 CFR 1219), mattress ≥27 1/4 × 51 5/8 in, 2 3/8 in slat gap, EU EN 716 cots - [Standard TV sizes](https://www.sizemarker.com/dimensions/standard-tv-sizes): 16:9 screen width & height for 32–85 in (55 in = 47.9 × 27.0 in), plus VESA mount patterns - [Standard semi-truck trailer dimensions](https://www.sizemarker.com/dimensions/standard-truck-trailer-dimensions): 53/48/40 ft dry-van interior L×W×H, pallet count, US legal maxima, EU 13.6 m tautliner - [Standard ISO tank container dimensions](https://www.sizemarker.com/dimensions/standard-iso-tank-container-dimensions): T11 20 ft frame 6058 × 2438 × 2591 mm, 21,000–26,000 L, tare, 36,000 kg max gross (ISO 668/1496-3) - [Standard jerry can dimensions](https://www.sizemarker.com/dimensions/standard-jerry-can-dimensions): 5–25 L UN HDPE jerricans (20 L ≈ 292 × 246 × 389 mm), NATO steel 20 L can, UN markings - [Standard wine bottle dimensions](https://www.sizemarker.com/dimensions/standard-wine-bottle-dimensions): 750 ml Bordeaux/Burgundy/Champagne height & diameter, 375 ml half, 1.5 L magnum, glass weight - [Standard bucket & pail dimensions](https://www.sizemarker.com/dimensions/standard-bucket-pail-dimensions): 5-gallon pail 11.9 in top OD × 14.5 in tall, 1–3.5 gal sizes, HDPE wall, 240/pallet - [Standard poly mailer sizes](https://www.sizemarker.com/dimensions/standard-poly-mailer-sizes): 6×9 to 19×24 in flat mailers, 2–2.5 mil wall, bubble mailer #000–#7, what fits each - [Standard shipping label sizes](https://www.sizemarker.com/dimensions/standard-shipping-label-sizes): 4×6 in thermal label all carriers accept (USPS/UPS/FedEx/DHL), plus A6 and barcode sizes - [Standard rebar sizes](https://www.sizemarker.com/dimensions/standard-rebar-sizes): US #3–#18 diameter/area/weight (ASTM A615), Canadian 10M–35M (CSA G30.18), European Ø8–Ø32 (EN 10080) - [Standard steel I-beam sizes](https://www.sizemarker.com/dimensions/standard-steel-i-beam-sizes): AISC W-shapes (W12×26 = 12.2 in deep), American S-beams, European IPE/HEA/HEB (EN 10365) - [Standard PVC pipe sizes](https://www.sizemarker.com/dimensions/standard-pvc-pipe-sizes): Schedule 40 & 80 OD/wall/ID for 1/2–6 in NPS (ASTM D1785), metric PVC-U Ø20–110 mm PN classes - [Standard toilet dimensions](https://www.sizemarker.com/dimensions/standard-toilet-dimensions): 12 in rough-in, elongated 29–31 in vs round 27–28 in, 15 in standard vs 17–19 in ADA seat height, IPC/ADA clearances - [Standard kitchen sink sizes](https://www.sizemarker.com/dimensions/standard-kitchen-sink-sizes): single 30–33 in, double 33/36 in, ~22 in front-to-back, 8–10 in deep, base-cabinet rule - [Standard CMU block dimensions](https://www.sizemarker.com/dimensions/standard-cmu-block-dimensions): nominal 8×8×16 in = actual 7 5/8 × 7 5/8 × 15 5/8 in (ASTM C90), 4–12 in widths, metric 190×190×390 mm - [Standard glass thickness](https://www.sizemarker.com/dimensions/standard-glass-thickness): float glass 2–19 mm (EN 572-2/ASTM C1036), ~2.5 kg/m² per mm, jumbo 3210 × 6000 mm sheets - [Standard garage door sizes](https://www.sizemarker.com/dimensions/standard-garage-door-sizes): single 8–10 × 7 ft, double 16–18 × 7 ft, 7 & 8 ft heights, RV/oversized, UK metric (ANSI/DASMA 102) - [Showcase](https://www.sizemarker.com/showcase): real before/after annotation cases with results - [Blog](https://www.sizemarker.com/blog): guides on spec diagrams, dimension labeling, returns reduction, and platform image rules ## Showcase cases - [Feature Callouts That Sell a Sneaker's Details](https://www.sizemarker.com/showcase/feature-callout-labels-demo): A white mesh sneaker marked with three feature callouts — breathable mesh, cushioned sole, secure lacing — so buyers read build quality off the photo. - [Everything a Sofa Buyer Needs, on One Listing Image](https://www.sizemarker.com/showcase/furniture-listing-annotation-demo): A velvet sofa as a complete listing image: 148×88×82 cm dimensions, feature callouts and a shipping badge — so buyers see every spec before they message you. - [A Bar Stool Buyers Can Measure Before They Order](https://www.sizemarker.com/showcase/amazon-bar-stool-size-labels-reduce-returns): A wooden bar stool listing image marked with a 40 × 40 cm seat, 70 cm seat height and a 30 cm footrest — so buyers check counter fit before they order. - [Bag Dimensions and Material, at a Glance](https://www.sizemarker.com/showcase/scenario-bag-size): A green leather handbag as a spec image: 30 × 22 × 14 cm, with full-grain leather and gold-tone hardware labels, so size and material are answered up front. - [Package Box Dimensions, Marked at a Glance](https://www.sizemarker.com/showcase/dimension-white-box-demo): A plain white product box marked with 24 cm height, 12 cm width and 8 cm depth on the carton itself, so buyers read the exact package size before they order. - [Amazon Lounge Chair Labels Cut Returns 60%](https://www.sizemarker.com/showcase/amazon-lounge-chair-size-labels-cut-returns): For this Amazon lounge chair listing, we used SizeMarker to add comprehensive size markers covering overall width, seat depth, back height, and footrest extension length, plus feature labels and a clean outline curve. Key annotations added: - Overall dimensions (width x depth x height) for space planning - Seat depth and back height for comfort assessment - Footrest extension length for reclining chairs - Feature callouts: material, weight capacity, mechanism - Contour outline separating product from background Result: Conversion rate increased by 35% and returns dropped by 60%, primarily eliminating size-mismatch complaints. The combination of precise measurements and feature labels turned the image into a complete decision-making tool. - [Amazon Wall Cabinet Size Labels Cut Refunds](https://www.sizemarker.com/showcase/amazon-wall-cabinet-size-labels-cut-refunds): For this solid wood wall cabinet listing on Amazon, we used SizeMarker to add precise width, height, and depth dimension lines directly on the product images. Key annotations added: - External dimensions (width x height x depth) - Internal shelf spacing for storage planning - Clean minimal annotation style matching the product aesthetic Result: Shoppers could instantly verify if the cabinet fits their wall space, leading to more confident purchases. Size-related refunds dropped to near zero, and customer service inquiries about dimensions decreased dramatically. ## All blog posts (201) - [Bol.com Product Image Requirements: Whose Photo Wins](https://www.sizemarker.com/blog/bol-com-product-image-requirements): Bol.com product image requirements start at 500 × 500 px — but a content score decides whose photo appears. Full specs, rejection traps and 2026 changes. - [A2-70 vs A4-80: What the Bolt Head Marking Really Says](https://www.sizemarker.com/blog/a2-70-vs-a4-80-stainless-bolt-marking): A2-70 vs A4-80 packs two facts into one code: the steel grade and the property class. What ISO 3506-1:2020 requires, and what the head must show. - [Sink Base Cabinet Size: Why a 33-Inch Sink Needs 36](https://www.sizemarker.com/blog/sink-base-cabinet-size): Sink base cabinet size is not the sink size: a 33-inch sink needs a 36-inch base. The cabinet, cutout and apron numbers to lock before you quote. - [Foam Density vs ILD: Why 30 Density Is Not Firmness](https://www.sizemarker.com/blog/foam-density-vs-ild): Foam density vs ILD are two different specs: density is kg/m3 durability, ILD is pounds of firmness. The four-line foam spec that stops cushion disputes. - [Packing List vs Commercial Invoice: Which Numbers Go Where](https://www.sizemarker.com/blog/packing-list-vs-commercial-invoice): Packing list vs commercial invoice: the two documents share five numbers, and customs, the carrier and the buyer each reject the shipment over a different one. - [Comfort Height Vanity vs Standard: 34 Inches Is the Limit](https://www.sizemarker.com/blog/comfort-height-vanity-vs-standard): Comfort height vanity or standard height? 32, 34 and 36 inches each serve a different buyer, and only one of them clears the ADA lavatory maximum. - [Size in the Product Title: What 75 Characters Changed](https://www.sizemarker.com/blog/size-in-product-title): Size in the product title now competes for 75 characters on Amazon. What to keep, what moves to item highlights, and where the dimensions belong. - [Hotel FF&E Specification Requirements: The 9-Document Packet](https://www.sizemarker.com/blog/hotel-ffe-specification-requirements): Hotel FF&E specification requirements, document by document: the nine files a hospitality buyer needs before your factory gets on the bid list. - [Returnless Refunds: The Break-Even Number, Not a Gut Call](https://www.sizemarker.com/blog/returnless-refund-break-even): A returnless refund only saves money when the item costs less than the trip home. Here is the break-even math, the platform rules, and where it stops working. - [Product Images Blurry After Upload: Where the Pixels Go](https://www.sizemarker.com/blog/product-images-blurry-after-upload): Product images blurry after upload? The softness is added in eight stages between your export and the buyer's screen. Here is each stage, and the fix. - [G90 vs Z275: Same Zinc, Three Ways to Read It Wrong](https://www.sizemarker.com/blog/g90-vs-z275-galvanized-coating-weight): G90 vs Z275 are the same 275 g/m2 of zinc, total both sides. Here is how galvanized coating weight designations differ, and where export specs break. - [Kaufland Product Image Requirements: The No-Text Trap](https://www.sizemarker.com/blog/kaufland-product-image-requirements): Kaufland product image requirements ban text on the picture, cap files at 10 MB and want 2,048 px. Here is where your dimensions go instead. - [Density-Based Freight Class: One Pallet, Three Classes](https://www.sizemarker.com/blog/density-based-freight-class): Density-based freight class means your carton dimensions set the bill. The 13-tier NMFC scale, the math, and how 20 inches of air moves two classes. - [Product Image Alt Text: 6 Patterns That Read as Blank](https://www.sizemarker.com/blog/product-image-alt-text): Product image alt text is where your spec diagram goes blank. Six anti-patterns, the fix for each, and what EU accessibility rules now require. - [Barcode Size Requirements That Stop Carton Rejections](https://www.sizemarker.com/blog/barcode-size-requirements-packaging): Barcode size requirements are a range, not one number: EAN-13 scales 80-200%, ITF-14 only 50-100%. Miss the floor or trim the quiet zone and the carton bounces. - [How Many Pallets Fit in a Truck? EU vs US, Row by Row](https://www.sizemarker.com/blog/how-many-pallets-fit-in-a-truck): How many pallets fit in a truck comes down to two numbers nobody sends you: the trailer internal width and your pallet footprint. Here is the math, and the law. - [CPSC eFiling: The 7 Data Points Your Importer Needs](https://www.sizemarker.com/blog/cpsc-efiling-requirements-for-suppliers): CPSC eFiling became mandatory on 8 July 2026. Your US importer signs the certificate, but all seven data elements come from your factory. Here is what to send. - [Duty-Free Commercial Samples: 4 Ways to Ship One in 2026](https://www.sizemarker.com/blog/duty-free-commercial-samples): Duty-free commercial samples still clear customs, but the de minimis shortcut is gone. Four routes to ship a sample, what each one demands, and where they fail. - [RFQ Response Time: Why Fast Replies Still Lose the Order](https://www.sizemarker.com/blog/rfq-response-time): RFQ response time is scored two ways on Alibaba, and B2B email averages 11h54m. The real benchmarks, and the first reply that actually gets you quoted. - [Desk Height Standards: Why 30 Inches Fails EN 527 by 2 mm](https://www.sizemarker.com/blog/desk-height-standards-en-527-vs-bifma): Desk height standards disagree by market: EN 527 fixes 740 mm, BIFMA guides 22-46.5 in, ADA caps 34 in. The real numbers, the gaps, and what to quote. - [First Angle vs Third Angle Projection: Read It in 5 Seconds](https://www.sizemarker.com/blog/first-angle-vs-third-angle-projection): First angle vs third angle projection decides which side of the sheet each view lands on. The 5-second test, the ISO rule, and where export orders break. - [Formaldehyde Emission Limits for Furniture: 6 Costly Myths](https://www.sizemarker.com/blog/formaldehyde-emission-limits-furniture-export): Formaldehyde emission limits for furniture tightened in the EU on 6 August 2026, and an E1 certificate no longer clears it. Six myths that stall shipments. - [How Long Do Buyers Have to Return an Item? Three Clocks](https://www.sizemarker.com/blog/how-long-buyers-have-to-return-an-item): How long do buyers have to return an item depends on three clocks: the 30-day marketplace window, the EU and UK 14-day right, and your own disclosure. - [Conveyor Belt Specifications: What EP 800/4 6+2 X Locks In](https://www.sizemarker.com/blog/conveyor-belt-specifications): Conveyor belt specifications decoded field by field: what EP 800/4 6+2 X commits you to, ISO 251 width tolerances, and the pulley diameter it already chose. - [CE Marking Size Requirements: 5 mm, and Where It Goes](https://www.sizemarker.com/blog/ce-marking-size-requirements): CE marking size requirements start at 5 mm high with locked proportions. Where the mark goes on product, packaging or documents, and what UKCA changes. - [How to Display Product Specifications: Table, Image, or Both](https://www.sizemarker.com/blog/how-to-display-product-specifications): How to display product specifications so buyers read them: Baymard 344-site data on spec scannability, in-scale images, and where dimensions belong. - [Rockwell vs Brinell vs Vickers: No Exact Conversion](https://www.sizemarker.com/blog/rockwell-vs-brinell-vs-vickers): Rockwell vs Brinell vs Vickers: what each test measures, which parts can take which, and why ASTM E140 calls every hardness conversion approximate. - [How to Photograph Small Parts: Why the Coin Trick Fails](https://www.sizemarker.com/blog/how-to-photograph-small-parts): How to photograph small parts so buyers can judge size: the 85% frame-fill trap, depth of field under 2 mm, and why a coin for scale backfires. - [Text Size on Product Images: 6 Myths and a 16 mm Test](https://www.sizemarker.com/blog/text-size-on-product-images): Text size on product images is set by a 16 mm tile, not your 1600 px export. The blur test, the contrast targets, and 6 myths that make dimensions vanish. - [Product Spec Change Checklist: 9 Places It Stays Wrong](https://www.sizemarker.com/blog/product-spec-change-checklist): A product spec change checklist for exporters: the 9 places one dimension is published, which field breaks first, and how to close the loop in one pass. - [ECT vs Mullen: Equivalent on Paper, Not on the Pallet](https://www.sizemarker.com/blog/ect-vs-mullen-box-strength): ECT vs Mullen decides whether your carton survives the stack or the forklift. What 32 ECT and 200# really certify, and which one you should specify. - [EUDR Furniture Requirements: No Grace Period for Wood](https://www.sizemarker.com/blog/eudr-furniture-requirements): EUDR furniture requirements start 30 December 2026 — and wooden-furniture SMEs get no extra six months. The exact data your buyer needs from you. - [STURDY Act Requirements: 27 Inches, 30 lb, 3.2 Cubic Feet](https://www.sizemarker.com/blog/sturdy-act-requirements): STURDY Act requirements catch any dresser 27 in tall, 30 lb, with 3.2 cu ft of enclosed storage. The scope thresholds, the tip-over tests and the key dates. - [Casting Tolerance Grades: What DCTG 12 Actually Allows](https://www.sizemarker.com/blog/casting-tolerance-grades-iso-8062): Casting tolerance grades decide what a foundry may ship. The ISO 8062-3 DCT chart in mm, the RMA machining allowance table, and how to write the callout. - [4x6 vs A6 Shipping Label: 3.4 mm Apart, Not Equal](https://www.sizemarker.com/blog/shipping-label-size-4x6-vs-a6): 4x6 vs A6 shipping label sizes differ by 3.4 mm in width and 4.4 mm in height. What GS1 requires for barcode size, placement and when to move up to A5. - [ABEC vs ISO Bearing Tolerance Class: Two Scales, One Trap](https://www.sizemarker.com/blog/abec-vs-iso-bearing-tolerance-class): ABEC vs ISO bearing tolerance class mapped in one chart, plus the inch-series scale that runs backwards and the runout a class upgrade actually buys. - [Toilet Rough-In Dimensions: The Number Nobody Labels](https://www.sizemarker.com/blog/toilet-rough-in-dimensions): Toilet rough-in dimensions decide whether a pan fits at all, yet no standard defines them. How to measure, label and publish the 10/12/14 in spec. - [How to Photograph Glass Products So the Edges Survive](https://www.sizemarker.com/blog/how-to-photograph-glass-products): How to photograph glass products so the edges stay readable: two background setups, the 56-degree polarizer rule, and an export spec buyers can measure against. - [Return Reason Codes: 2 of 10 Even Mention Size](https://www.sizemarker.com/blog/return-reason-codes): Return reason codes are a ten-item list and only two mention size, so your dashboard undercounts fit problems. Here is how to recover the real number. - [Length, Width, Height Order: Why Buyers Read It Wrong](https://www.sizemarker.com/blog/length-width-height-order): Length width height order is not a standard. GS1 defines width by the face you are looking at, then flips it on the shipping case. Here is what to send buyers. - [ADA Clearance Dimensions: 8 Numbers US Buyers Check](https://www.sizemarker.com/blog/ada-clearance-dimensions-furniture): ADA clearance dimensions decide whether your table or desk passes a US review: 28-34 in tops, 27 in knee clearance height, 30x48 in clear floor space. - [Agentic Commerce Product Feed: The Fields AI Agents Read](https://www.sizemarker.com/blog/agentic-commerce-product-feed): The agentic commerce product feed outlived in-chat checkout. Here are the required fields, the optional ones that decide fit, and what to fix first. - [Product Image Aspect Ratio: Why Spec Diagrams Get Cropped](https://www.sizemarker.com/blog/product-image-aspect-ratio): Product image aspect ratio decides which part of your spec diagram survives the crop. The ratio math, the 10% safe margin, and the platform rules. - [Mercado Libre Image Requirements: 800 px Is the Real Floor](https://www.sizemarker.com/blog/mercado-libre-image-requirements): Mercado Libre image requirements from the official seller docs: the 500-1,920 px window, the 800 px zoom threshold, per-category caps, and size-chart rules. - [How to Photograph Building Materials: Shoot the Range](https://www.sizemarker.com/blog/how-to-photograph-building-materials): How to photograph building materials so the sample matches the pallet: shade variation classes, gloss units, calibre, and the six images every SKU needs. - [IBC Tote vs Steel Drum: 49% More Liters Per Square Meter](https://www.sizemarker.com/blog/ibc-tote-vs-steel-drum): IBC tote vs steel drum, decided with real numbers: footprints, UN codes 31HA1 and 1A1, retest clocks, and how much liquid each holds per square meter of floor. - [How to Calculate Return Rate: 5 Ways the Number Lies](https://www.sizemarker.com/blog/how-to-calculate-return-rate): How to calculate return rate without fooling yourself: the formula, the cohort trap, units vs value, and the reason breakdown that shows what to fix. - [Dining Chair Seat Height: The 10-Inch Rule and Its Limits](https://www.sizemarker.com/blog/dining-chair-seat-height): Dining chair seat height is set by the table, not the chair: keep 10-12 in (25-30 cm) between the seat and the apron underside. Numbers, limits, exceptions. - [H7/h6 Fit Tolerance: Clearance, Not Transition](https://www.sizemarker.com/blog/h7-h6-fit-tolerance): H7/h6 fit tolerance is a clearance fit, not a transition fit. What H, h, 6 and 7 mean, the ISO 286 numbers at 25 mm, and where the code belongs. - [WhatsApp Business Catalog Image Size: 500 px Is Not Enough](https://www.sizemarker.com/blog/whatsapp-business-catalog-image-size): WhatsApp Business catalog image size, from Meta's real 500 px floor to the size buyers can actually read, plus a four-image template for every SKU. - [How to Photograph Large Furniture in a Small Space](https://www.sizemarker.com/blog/photograph-large-furniture-small-space): How to photograph large furniture in a small space: the working-distance table, the focal length that keeps proportions honest, and a 7-step shoot order. - [ISPM 15 Marking Requirements: 6 Stamps That Fail at Customs](https://www.sizemarker.com/blog/ispm-15-marking-requirements): ISPM 15 marking requirements in plain English: the four parts of a legal stamp, the six mistakes that get containers held, and which wood packaging is exempt. - [Restocking Fee Rules by Marketplace: Who Can Charge What](https://www.sizemarker.com/blog/restocking-fee-rules-by-marketplace): Restocking fee rules by marketplace: most platforms now ban the fee and the EU never allowed it. The table, the law behind it, and what to do instead. - [How to Photograph Reflective Metal Products: 6 Myths](https://www.sizemarker.com/blog/how-to-photograph-reflective-metal-products): How to photograph reflective metal products: a polariser barely touches bare metal. Six myths, the physics behind each, and a setup that keeps edges visible. - [Gear Module vs Diametral Pitch: 25.4 Is Not a Fit](https://www.sizemarker.com/blog/gear-module-vs-diametral-pitch): Gear module vs diametral pitch: the 25.4 conversion lines up two quotes and never guarantees a fit. Four sourcing scenarios and the spec block buyers can check. - [Product Photo Color Accuracy: 5 Places the Color Breaks](https://www.sizemarker.com/blog/product-photo-color-accuracy): Product photo color accuracy breaks in five handoffs between your studio and the buyer screen. Where each one fails, and which four you can fix. - [Type X vs Type C Drywall: One Isn't in the Standard](https://www.sizemarker.com/blog/type-x-vs-type-c-drywall): Type X vs Type C drywall: one is defined in ASTM C1396 and the other is in no standard at all. What that means for export specs and EN 520 markets. - [JIC vs ORFS vs BSP: The Fitting That Screws On and Leaks](https://www.sizemarker.com/blog/jic-vs-orfs-vs-bsp): JIC vs ORFS vs BSP fittings can share the same thread but seal in three different places. The 60-second ID routine and the dash-size trap table. - [What Size TV Stand for a 65-Inch TV? The 4 Numbers](https://www.sizemarker.com/blog/what-size-tv-stand-for-65-inch-tv): What size TV stand for a 65-inch TV: the screen is 56.7 in wide, not 65 — plus foot span, usable top width and height, and the numbers to publish. - [Rectified vs Non-Rectified Tile: 3 Numbers on the Spec Card](https://www.sizemarker.com/blog/rectified-vs-non-rectified-tile): Rectified vs non-rectified tile, decoded: the ISO 13006 work size on the box, the caliber trap, and the minimum grout joint each type can actually be laid at. - [Office Chair Seat Height Standard: Four Types, Four Ranges](https://www.sizemarker.com/blog/office-chair-seat-height-standard): Office chair seat height standard by type: EN 1335-1 Table 2 values for Ax, A, B and C, why BIFMA sets none, and the 4 lines export buyers check. - [Countertop Overhang: Three Standards, Three Limits](https://www.sizemarker.com/blog/countertop-overhang): Countertop overhang has three different published limits, and none is the 1.5 in everyone quotes. Front lip, cantilever, seating knee space and load, sourced. - [FIBC Safety Factor: What 5:1 and 6:1 Actually Prove](https://www.sizemarker.com/blog/fibc-safety-factor): FIBC safety factor is a design type-test ratio, not a strength rating. What 5:1, 6:1 and the 1.8 stacking factor really prove, and what the label must carry. - [Crib Mattress Fit Requirements: What Changed in 2026](https://www.sizemarker.com/blog/crib-mattress-fit-requirements): Crib mattress fit requirements changed twice in 2026: new corner-gap testing from 3 May and a new crib standard from 1 August. The four numbers to publish. - [Product Dimensions Structured Data: Fields Nobody Fills In](https://www.sizemarker.com/blog/product-dimensions-structured-data): Product dimensions structured data in schema.org, Google Merchant Center and the ChatGPT feed: every field, copy-paste JSON-LD, and the rule that breaks it. - [Custom-Made Goods Return Rights: The Exemption You Can Lose](https://www.sizemarker.com/blog/custom-made-goods-return-rights): Custom-made goods return rights: the EU and UK 14-day withdrawal carve-out, the two conditions it turns on, and the disclosure slip that costs 12 months. - [Perspective Distortion in Product Photos: It's Not the Lens](https://www.sizemarker.com/blog/perspective-distortion-product-photos): Perspective distortion in product photos comes from camera distance, not focal length. The arithmetic, a distance table, and why no lens adds scale. - [Digital Product Passport: What Ships When, 2026-2029](https://www.sizemarker.com/blog/digital-product-passport-timeline): Digital Product Passport timeline by product group: battery passport 18 Feb 2027, steel 2026, textiles 2027, furniture 2028, plus the 18-24 month rule. - [WLL vs MBL: 6 Labels That Get Slings Rejected](https://www.sizemarker.com/blog/wll-vs-mbl-load-rating-labels): WLL vs MBL differ by a design factor of 2:1 to 7:1, so the wrong label overstates capacity by a multiple. Six rejected patterns and what to write instead. - [mAh to Wh: The Number Your Airline Reads Is Not on the Box](https://www.sizemarker.com/blog/mah-to-wh-battery-shipping-limits): mAh to Wh conversion decides whether a battery flies. The 100 Wh and 160 Wh thresholds, PI 965/966/967, the 30% state-of-charge rule, and the voltage mistake. - [NPT vs BSP Thread: They Screw Together, Then They Leak](https://www.sizemarker.com/blog/npt-vs-bsp-thread-identification): NPT vs BSP thread runs 14 TPI in both at 1/2 in, so it assembles and then leaks. TPI and major-diameter tables, plus an eight-field callout template. - [EI30 vs FD30: Four Markets, Four Fire Door Ratings](https://www.sizemarker.com/blog/ei30-vs-fd30-fire-door-ratings): EI30 vs FD30 is not the same rating: EI covers integrity and insulation, FD covers integrity only. Four export markets, four systems, one decision tree. - [Aluminium Extrusion Slot Width: Why 2020 Is Not a Spec](https://www.sizemarker.com/blog/aluminium-extrusion-slot-width): Aluminium extrusion slot width is the number 2020 never tells you. Five ordering mistakes, the kg/m test, and the eight-field spec block that ends them. - [Mesh Count vs Micron: Same 100 Mesh, 51 Microns Apart](https://www.sizemarker.com/blog/mesh-count-vs-micron-opening): Mesh count vs micron: mesh is a weave density, not an aperture. Two 100-mesh cloths can differ by 51 microns and both be honestly labelled. - [Drawer Slide Clearance: Lock 4 Numbers Before You Cut](https://www.sizemarker.com/blog/drawer-slide-clearance-sizing): Drawer slide clearance is 12.7 mm per side for side-mount and a material-dependent deduction for undermount. Here is the order to lock the numbers in. - [Cabinet Hinge Boring Dimensions: Five Numbers, Not One](https://www.sizemarker.com/blog/cabinet-hinge-boring-dimensions): Cabinet hinge boring dimensions are five numbers, not one: 35 mm cup, 13 mm depth, drilling distance, fixing pattern and cup position along the door. - [STC vs Rw: Why Your 45 dB Window Gets Graded at 39](https://www.sizemarker.com/blog/stc-vs-rw-sound-rating): STC vs Rw sound ratings differ by 1-2 points, but Rw+Ctr can cut 6 dB. What each index measures, which market grades on which, and how to write the acoustic line. - [Full Overlay vs Half Overlay: Two Answers, 9.5 mm Apart](https://www.sizemarker.com/blog/full-overlay-vs-half-overlay-cabinet-doors): Full overlay vs half overlay means different geometry on face-frame and frameless cabinets: the door-size math, the reveal, and what to ask before cutting. - [Shore A vs Shore D: Why 'Shore 70' Is Not a Spec](https://www.sizemarker.com/blog/shore-a-vs-shore-d-hardness): Shore A vs Shore D hardness are two instruments, not two precisions: why 'Shore 70' is not a spec, why no conversion exists, and how to write a callout that holds. - [Stair Riser and Tread Dimensions: The 3/8-Inch Rule](https://www.sizemarker.com/blog/stair-riser-and-tread-dimensions): Stair riser and tread dimensions are capped by two numbers per market, and failed by a third: no riser may differ from another by more than 3/8 inch. Limits for four markets. - [Ra vs Rz: Same Number, Two Completely Different Surfaces](https://www.sizemarker.com/blog/ra-vs-rz-surface-roughness): Ra vs Rz measure different things — two parts can share an Ra and only one will seal. What each parameter sees, why no conversion factor works, and what ISO 21920 changed. - [What Size Dining Table Seats 8? Run the Clearance Math](https://www.sizemarker.com/blog/what-size-dining-table-seats-8): What size dining table seats 8 takes three numbers, not one: edge length per person, table width, and the clearance behind the chairs. With the full sizing table. - [Cover Width vs Overall Width: 1,000 mm That Covers 840](https://www.sizemarker.com/blog/cover-width-vs-overall-width-panels): Cover width vs overall width decides panel count: a 1,000 mm sheet covers 840 mm. The profile table, the panel-count formula and where the 25% shortfall comes from. - [How to Measure VESA Mount Size: 3 Numbers, Not 1](https://www.sizemarker.com/blog/how-to-measure-vesa-mount-size): How to measure VESA mount size: horizontal spacing, vertical spacing and thread. The full MIS-B to MIS-F table, plus the screw length that cracks panels. - [IP68 vs IP66: Why the Higher Number Can Fail a Hose Test](https://www.sizemarker.com/blog/ip68-vs-ip66-water-jet-test): IP68 vs IP66 is not a ranking: in IEC 60529 the water tests stop being cumulative after 6. What each digit certifies, and what belongs on your spec sheet. - [Made-to-Measure Orders: Lock These 6 Things Before Quoting](https://www.sizemarker.com/blog/made-to-measure-order-process-export): The made-to-measure order process: who owns a wrong dimension, opening vs product size, the change freeze point, and when custom goods lose the 14-day return right. - [Tolerance Stack-Up Explained: 5 Good Parts, 1 Bad Fit](https://www.sizemarker.com/blog/tolerance-stack-up-explained-export): Tolerance stack-up explained: 5 parts at ±0.5 mm give ±2.5 mm worst case but ±1.118 mm RSS. When each method is right, and why ISO 2768-mK is now half obsolete. - [How to Photograph a Product for Measurement: 4 Setups](https://www.sizemarker.com/blog/how-to-photograph-a-product-for-measurement): How to photograph a product for measurement: lens distortion and perspective error are different problems. At 1 m, 100 mm of depth costs 11% in size. Four setups ranked. - [Maximum Shelf Span Without Support: Where Shelves Sag](https://www.sizemarker.com/blog/maximum-shelf-span-without-support): Maximum shelf span without support by material and thickness: 19 mm particleboard manages 700-760 mm at L/180. Span tables, creep, and four ways to buy back span. - [Rebar Size Designations: 6 Myths That Ship the Wrong Bar](https://www.sizemarker.com/blog/rebar-size-designations-export): Rebar size designations decoded: #4 is 12.7 mm not 4 mm, #13 is the same bar, and Grade 60, B500B and HRB400 are three different yield strengths. - [What Bearing Numbers Mean: 6205 Is Three Dimensions](https://www.sizemarker.com/blog/what-bearing-numbers-mean-6205): What bearing numbers mean: 6205 decodes to a 25 mm bore, 52 mm OD and 15 mm width under ISO 15. Bore-code table, dimension series, suffixes and what to quote. - [Wardrobe Internal Dimensions: The 6 Numbers Buyers Ask For](https://www.sizemarker.com/blog/wardrobe-internal-dimensions-buyers-ask): Wardrobe internal dimensions decide whether coats fit: clear depth, long-hang and short-hang heights, rail clearance, shelf depth and load — the numbers listings omit. - [Door Handing: How to Determine It Before the Container Ships](https://www.sizemarker.com/blog/how-to-determine-door-handing-export): How to determine door handing when ANSI, US residential and DIN conventions disagree: three reference sides, five order scenarios, and the diagram that ends disputes. - [Sheet Metal Gauge to mm: 16 Gauge Is Four Thicknesses](https://www.sizemarker.com/blog/sheet-metal-gauge-to-mm-export): Sheet metal gauge to mm depends on the metal: 16 gauge is 1.52 mm in steel, 1.61 mm galvanized, 1.59 mm stainless, 1.29 mm aluminium. Four tables compared. - [Assembly Instructions for Flat Pack Furniture: 4 Formats](https://www.sizemarker.com/blog/assembly-instructions-flat-pack-furniture): Assembly instructions for flat pack furniture decide your "missing parts" return rate. Four formats compared against IEC 82079-1, the GPSR language rule and cost. - [Rough Opening vs Unit Size: The 3 Numbers on Every Order](https://www.sizemarker.com/blog/rough-opening-vs-unit-size-windows-doors): Rough opening vs unit size is why correct windows get rejected on site. The three fenestration numbers, allowances by market, and the egress number nobody prints. - [Wood Moisture Content for Export Furniture: 6 Answers](https://www.sizemarker.com/blog/wood-moisture-content-export-furniture): Wood moisture content for export furniture decides whether a table lands flat or cracked. Six questions answered with real EMC numbers by destination market. - [Gross vs Net Capacity: Why a 500L Fridge Holds 420L](https://www.sizemarker.com/blog/gross-vs-net-capacity-labeling): Gross vs net capacity can differ by up to 32%. What each number means, the gap by category, the unit traps, and how to label capacity buyers can verify. - [Oversized Item Return Shipping Cost: The Real Math](https://www.sizemarker.com/blog/oversized-item-return-shipping-cost): Oversized item return shipping cost runs $100-700 in freight alone. Here is the full cost stack, the size thresholds, and which returns you can prevent. - [Plug Type and Voltage by Export Market: What to Label](https://www.sizemarker.com/blog/plug-type-voltage-by-export-market): Plug type and voltage by export market, in one table: 23 markets with voltage, frequency, plug letter and the safety mark each one legally requires. - [R-Value vs U-Value vs Lambda: The Numbers Buyers Misread](https://www.sizemarker.com/blog/r-value-vs-u-value-vs-lambda): R-value vs U-value vs lambda explained for exporters: what each number measures, the metric-imperial trap, and how to quote insulation specs buyers trust. - [Counter Height vs Bar Height Stools: 5 Costly Mistakes](https://www.sizemarker.com/blog/counter-height-vs-bar-height-stools): Counter height vs bar height stools: the 5 sizing mistakes that drive returns, with seat-height, clearance and spacing numbers in inches and millimetres. - [EU Packaging Regulation for Exporters: What Changes in 2026](https://www.sizemarker.com/blog/eu-packaging-regulation-for-exporters): The EU packaging regulation for exporters applies 12 August 2026. What changes then, what waits until 2030, and the empty-space number most sources get wrong. - [GPSR Labelling Requirements: 6 Myths Exporters Still Believe](https://www.sizemarker.com/blog/gpsr-labelling-requirements): GPSR labelling requirements have applied since 13 December 2024. Six myths still get non-EU sellers listings pulled, and the Article text that settles each. - [Garment Measurement Points: 4 Situations, 4 Different Charts](https://www.sizemarker.com/blog/garment-measurement-points-spec-sheet): Garment measurement points decide every fit dispute. Four export situations, four different documents, plus the tolerance rule that settles rejections. - [Appliance Cutout Dimensions Aren’t the Appliance’s Size](https://www.sizemarker.com/blog/appliance-cutout-dimensions-export): Appliance cutout dimensions are the opening an appliance needs, not its own size. Eight questions export cabinet catalogs must answer before shipping. - [How to Communicate Product Dimensions to Buyers](https://www.sizemarker.com/blog/communicate-product-dimensions-to-buyers): How to communicate product dimensions to buyers: four methods — email spec, technical drawing, plain photo, annotated photo — compared on comprehension and error risk. - [Plywood Dimensions and Grades for Export Buyers](https://www.sizemarker.com/blog/plywood-dimensions-grades-export): Plywood dimensions and grades confuse export buyers: nominal vs actual thickness, sheet sizes, face and back grades, glue class, and formaldehyde compliance, explained. - [Export Pallet Dimensions: Standard Sizes & Container Fit](https://www.sizemarker.com/blog/export-pallet-dimensions-container-fit): Export pallet dimensions set container fit and freight cost — the six ISO 6780 footprints, which pallet to load per market, and how many fit a 20ft or 40ft container. - [Sofa Dimensions for Export: 5 Mistakes That Lose Orders](https://www.sizemarker.com/blog/sofa-dimensions-for-export): Sofa dimensions for export decide whether it fits the room and clears the doorway. The 5 mistakes that lose orders — including the number almost no listing shows. - [Flange Dimensions for Export: The Numbers Buyers Ask For](https://www.sizemarker.com/blog/flange-dimensions-for-export): Flange dimensions for export decide fit: the same OD can hide a different bolt circle. The seven numbers buyers ask for, and the mistakes that ship the wrong part. - [Dimension Drawing for a Product Catalog: What Buyers Scan](https://www.sizemarker.com/blog/dimension-drawing-for-product-catalog): A dimension drawing for a product catalog answers the buyer's first question — how big is this and will it fit — before they ever email. Here's what goes on it, field by field. - [Caster Wheel Dimensions: Why a 4-Inch Caster Isn't 4 Inches](https://www.sizemarker.com/blog/caster-wheel-dimensions-load-ratings): Caster wheel dimensions buyers get wrong: overall height is not wheel diameter, top plates are not standardised, and load ratings do not compare across brands. - [LED Lighting Specifications: IP67 Is Not Better Than IP65](https://www.sizemarker.com/blog/led-lighting-specifications-export): LED lighting specifications for export buyers: why IP67 is not an upgrade on IP65, what a 3000 K label really allows, and which test report proves what. - [Powder Coating Specifications by Environment, Not Hours](https://www.sizemarker.com/blog/powder-coating-specifications-corrosion): Powder coating specifications that survive the buyer's climate: corrosivity categories, real DFT windows, and why salt-spray hours predict nothing. - [Sanitaryware Specifications for Export: 5 Costly Myths](https://www.sizemarker.com/blog/sanitaryware-specifications-export): Sanitaryware specifications for export fail on four dimensions: rough-in, trap type, tap hole centres and clearances. Five myths that cost orders. - [AWG vs mm² Cable Specs: The 20% Gap Buyers Miss](https://www.sizemarker.com/blog/awg-vs-mm2-cable-specifications): AWG vs mm² cable specifications are not a unit conversion but two systems. Why 14 AWG and 2.5 mm² differ by 20%, and what belongs on the spec sheet. - [Upholstery Fabric Specifications: 4 Numbers Buyers Misread](https://www.sizemarker.com/blog/upholstery-fabric-specifications): Upholstery fabric specifications go wrong on four numbers — weight, width, abrasion and repeat. What each actually means, and what must sit next to it. - [Metric vs Imperial Threads: Send Buyers the Right Spec](https://www.sizemarker.com/blog/metric-vs-imperial-fastener-threads): Metric vs imperial fastener threads look alike but never interchange. How to read M8x1.25 vs 1/4-20 UNC and send overseas buyers the exact thread spec — scenario by scenario. - [Stone Slab Dimensions: How Big Is a Slab, Really?](https://www.sizemarker.com/blog/stone-slab-dimensions-thickness): Stone slab dimensions aren't standardized the way buyers assume — thickness is (2 cm / 3 cm), length and width aren't. What overseas buyers ask about granite, quartz and porcelain slab size and usable yield. - [Export Carton Shipping Marks: What Goes on the Box](https://www.sizemarker.com/blog/export-carton-shipping-marks): Export carton shipping marks aren't one ISO standard — the contract and L/C set them, plus ISO 780 handling symbols and customs origin law. What goes on a master carton, field by field. - [Bed Frame Size vs Mattress Size: 5 Sizing Mistakes](https://www.sizemarker.com/blog/bed-mattress-sizing-mistakes): Bed frame size vs mattress size mix-ups, plus Queen and King meaning different cm in the US, UK, EU and AU, drive size returns. 5 myths busted, sourced charts. - [Steel Profile Dimensions: The Export Buyer's Reference](https://www.sizemarker.com/blog/steel-profile-dimensions-export): Steel profile dimensions buyers ask for: angle, channel, SHS/RHS and round tube sizes, wall thickness and weight per metre, and their naming traps. - [Tile PEI Rating vs Water Absorption: Read the Spec Card](https://www.sizemarker.com/blog/tile-pei-rating-vs-water-absorption): Tile PEI rating vs water absorption vs slip (DCOF/R-rating): three specs export tile buyers confuse, plus exactly what to put on your tile spec card. - [Standard Cabinet Dimensions Wholesale Buyers Ask For](https://www.sizemarker.com/blog/standard-cabinet-dimensions-wholesale-buyers): The standard cabinet dimensions wholesale buyers ask for — base, wall and tall sizes, depths, toe kick, and framed vs frameless, from real specs. - [How to Label Glass and Mirror Dimensions for Export](https://www.sizemarker.com/blog/how-to-label-glass-and-mirror-dimensions-for-export): How to label glass and mirror dimensions for export: real thickness ranges, tolerances, and spec fields buyers check — with ASTM C1036 and EN 572 numbers. - [Pipe and Fitting Dimensions Buyers Ask For: NPS, DN, OD](https://www.sizemarker.com/blog/pipe-and-fitting-dimensions-nps-dn-schedule-od): Pipe and fitting dimensions confuse buyers when NPS, DN, schedule and OD get mixed up. What each one means and what to put on your spec diagram. - [How to Label Metal Product Specifications: 5 Costly Myths](https://www.sizemarker.com/blog/how-to-label-metal-product-specifications): How to label metal product specifications so buyers do not reject good steel: the 5 myths on gauge, grade, finish, and tolerance that lose export orders. - [Spec Sheet vs Technical Drawing: What Buyers Actually Need](https://www.sizemarker.com/blog/spec-sheet-vs-technical-drawing): Spec sheet vs technical drawing: one helps a buyer order, the other helps a factory build. Sending the wrong one stalls quotes — here is how to tell them apart. - [Building Material Coverage per Box: Tiles, Flooring & Sheets](https://www.sizemarker.com/blog/building-material-coverage-per-box): Building material coverage per box decides how many boxes your buyer orders — here is the tile, flooring, and sheet math to label it right on every spec sheet. - [Goods Not as Described: What Actually Counts as a Spec](https://www.sizemarker.com/blog/goods-not-as-described-claims): Goods not as described is decided by the description in your contract, not your photo. What counts as a spec, the CISG rules, claim windows and who pays. - [Pre-Shipment Inspection Dimension Checks That Fail Orders](https://www.sizemarker.com/blog/pre-shipment-inspection-dimension-checks): A pre-shipment inspection dimension check fails good products over undocumented tolerances. Five scenarios, the ISO 2859-1:2026 update, and the fix. - [300 DPI vs 72 DPI: Why Product Images Only Need Pixels](https://www.sizemarker.com/blog/300-dpi-vs-72-dpi-product-images): 300 DPI vs 72 DPI is a fight over a file tag, not image quality. Here is the pixel math that settles print catalogs, marketplace specs and spec diagrams. - [Installation Clearance Dimensions: 5 Myths That Cost Sales](https://www.sizemarker.com/blog/installation-clearance-dimensions): Installation clearance dimensions decide whether your product fits — not L×W×H. 5 myths busted with NKBA, OSHA and ADA figures, plus a labeling checklist. - [Home Depot Product Image Requirements: 2026 Vendor Traps](https://www.sizemarker.com/blog/home-depot-product-image-requirements): Home Depot product image requirements in 2026: 1,000 x 1,000 px minimum, white #FFFFFF background, .jpg only — plus the category traps that reject SKUs. - [Gross Weight vs Net Weight vs Volumetric Weight Explained](https://www.sizemarker.com/blog/gross-net-volumetric-weight-export): Gross weight vs net weight vs volumetric weight: what each means on an export spec sheet, how chargeable weight gets billed, and what mislabeling costs. - [Size Return Rate by Category: Which Products Ship Back](https://www.sizemarker.com/blog/size-return-rate-by-category): Size return rate by category: apparel, footwear, furniture and more — the real ranges, why size drives most returns, and the labeling fixes that cut each. - [How to Respond to an Alibaba RFQ and Win the Quote](https://www.sizemarker.com/blog/alibaba-rfq-spec-sheet): How to respond to an Alibaba RFQ so your quote wins: what goes in the spec sheet, how clear dimensions shorten back-and-forth, and a scenario playbook. - [Faire Image Requirements: The 2026 Spec Sheet for Brands](https://www.sizemarker.com/blog/faire-image-requirements): Faire image requirements for 2026: exact pixel sizes, aspect ratios, and background rules for product, feature, and cover images that pass review. - [Show Finish and Material Options: 5 Myths Costing Orders](https://www.sizemarker.com/blog/show-finish-and-material-options-in-product-images): Show finish and material options the right way: 5 myths about variant photos that cost suppliers orders, and how to label each finish so buyers pick right. - [How to Make a Wholesale Line Sheet That Gets Reorders](https://www.sizemarker.com/blog/how-to-make-a-wholesale-line-sheet): A wholesale line sheet is the catalog page retail buyers order from. Learn what to include (prices, MOQ, case pack, lead time) so buyers actually reorder. - [Temu Product Image Requirements (2026 Spec Sheet)](https://www.sizemarker.com/blog/temu-product-image-requirements): Temu product image requirements for 2026: pixel sizes, the pure-white main image rule, file limits, and the exact reasons Temu images get rejected. - [How to Label Building Material Dimensions (By Material)](https://www.sizemarker.com/blog/how-to-label-building-material-dimensions): How to label building material dimensions on product images: tile, plywood, lumber, brick and pipe — nominal vs actual size, standards, and tolerances. - [Reuse Product Images Across Platforms: Spec Table](https://www.sizemarker.com/blog/reuse-product-images-across-platforms): Reuse product images across platforms with one master spec table — Amazon, Alibaba, Wayfair, and TikTok Shop pixel, ratio, and background rules compared. - [Will Furniture Fit Through the Door? A Supplier's Fix](https://www.sizemarker.com/blog/will-furniture-fit-through-door): Will furniture fit through the door? Only if you publish delivery-access dimensions. Map every access path and label the product image before buyers order. - [Nominal vs Actual Dimensions: Why a 2x4 Isn't 2 Inches](https://www.sizemarker.com/blog/nominal-vs-actual-dimensions): Nominal vs actual dimensions: why a 2x4 is really 1.5x3.5 in, how nominal sizing works across lumber, plywood, pipe and brick, and why listings need real sizes. - [Global Sources Image Requirements: Specs That Win Inquiries](https://www.sizemarker.com/blog/global-sources-image-requirements): Global Sources image requirements, decoded: the main-image, background, format, and file-size rules suppliers must hit to win inquiries. - [How to Label Weight Capacity on Product Images Buyers Trust](https://www.sizemarker.com/blog/how-to-label-weight-capacity-product-images): How to label weight capacity on product images so B2B buyers trust the load rating: static vs dynamic load, safety factors, and where to place the number. - [TikTok Shop Product Image Requirements (2026 Specs)](https://www.sizemarker.com/blog/tiktok-shop-product-image-requirements): TikTok Shop product image requirements for 2026: minimum size, 1:1 ratio, clean background rules, file limits, and why the still image still decides the sale. - [Product Photo Callouts: How to Label Features Buyers Read](https://www.sizemarker.com/blog/product-photo-callouts): Product photo callouts done right: how many to use, how long, and the 6 rules that make feature labels convert instead of clutter the image. - [Wayfair Image Requirements: Specs Suppliers Must Hit](https://www.sizemarker.com/blog/wayfair-image-requirements): Wayfair image requirements for suppliers: exact resolution, white hero background, image count, and the dimension rule that decides your return rate. - [How to Show Product Size in a Photo Without a Model](https://www.sizemarker.com/blog/how-to-show-product-size-in-a-photo): How to show product size in a photo without a model: which scale tricks actually work, which mislead buyers, and the one that removes the guesswork. - [Container Loading Quantity: How Many Units Actually Fit](https://www.sizemarker.com/blog/container-loading-quantity): Container loading quantity explained: calculate how many units fit a 20ft, 40ft, or 40HC container from carton size — and why the real number runs lower. - [B2B Marketplace Image Requirements: The Specs That Matter](https://www.sizemarker.com/blog/b2b-marketplace-image-requirements): B2B marketplace image requirements compared: Alibaba, Made-in-China, and Global Sources specs, file limits, and the one image rule that wins inquiries. - [Rug Size Returns: The Dimensions That Stop 'Too Small'](https://www.sizemarker.com/blog/rug-size-returns): Rug size returns almost always trace to one mistake: a rug too small for the room. Here are the standard sizes and the dimensions to show buyers to prevent it. - [Folded and Assembled Dimensions: Show Both or Eat the Return](https://www.sizemarker.com/blog/folded-and-assembled-dimensions): Folded and assembled dimensions are the two sizes buyers confuse most: show only one and it does not fit becomes a return. Here is how to label both states. - [Product Dimension Tolerance: How to Label ± Specs Buyers Trust](https://www.sizemarker.com/blog/product-dimension-tolerance): Product dimension tolerance decides whether an overseas buyer trusts your spec or files a mismatch claim. Here is how to set, state, and label the ± band by material. - [Product Catalog for the Canton Fair: A Prep Playbook](https://www.sizemarker.com/blog/canton-fair-product-catalog-prep): Build a product catalog for the Canton Fair that wins follow-up orders: 2026 phase dates, what buyers keep, and a spec-diagram prep checklist. - [Made-in-China.com Product Images That Win Inquiries](https://www.sizemarker.com/blog/made-in-china-product-images): How to prepare Made-in-China.com product images that win buyer inquiries — image standards, the spec diagram buyers look for, and mistakes to avoid. - [Shoe Size Conversion Chart That Actually Cuts Returns](https://www.sizemarker.com/blog/shoe-size-conversion-chart): A shoe size conversion chart for US, UK, EU and CM — plus why length-only charts miss the width problem that drives most footwear returns. - [Product Dimensions in Cm or Inches? The Answer Is Both](https://www.sizemarker.com/blog/product-dimensions-cm-or-inches): Product dimensions in cm or inches? US labels legally need both, the EU requires metric first. The dual-unit format that works everywhere, plus rounding rules. - [How to Write an Export Quotation That Beats a Cheaper One](https://www.sizemarker.com/blog/how-to-write-export-quotation): How to write an export quotation that wins orders: four myths about price and specs debunked, plus a copy-paste spec block and pre-send checklist. - [How to Photograph Furniture: A 7-Step Setup That Sells](https://www.sizemarker.com/blog/how-to-photograph-furniture): How to photograph furniture without distortion: a 7-step setup covering lens choice, f/8 aperture, soft key light, angles, and the shots catalogs need. - [Master Carton Dimensions: The Packing Specs Buyers Ask For](https://www.sizemarker.com/blog/master-carton-dimensions-export): Master carton dimensions decide freight quotes and container plans. A copy-paste packing spec template with CBM math, load counts, and ISPM-15 basics. - [Alibaba.com Image Requirements: Specs, Limits, and Fixes](https://www.sizemarker.com/blog/alibaba-image-requirements): Alibaba.com image requirements in one table: 350×350px minimum, 1:1–1:1.3 ratio, 3MB cap, 6 photo slots — plus fixes for uploads that keep failing. - [Dimension Drawing for a Product Catalog: What Buyers Need](https://www.sizemarker.com/blog/dimension-drawing-vs-spec-diagram-vs-cad): A dimension drawing for a product catalog, a spec diagram, and a CAD file solve different problems, and most buyers only need one before ordering. - [Can You Use AI-Generated Images to Show Product Size?](https://www.sizemarker.com/blog/ai-generated-images-cant-measure-dimensions): Can I use AI-generated images on Amazon or eBay? Usually yes — but none of them can accurately show a product's real dimensions. - [How to Make a Product Spec Sheet Buyers Actually Read](https://www.sizemarker.com/blog/product-spec-sheet-buyers-read): How to make a product spec sheet buyers actually read: the field priority order across furniture, industrial, and building-material sourcing. - [Building-Material Size Labeling: Tiles, Panels & Profiles](https://www.sizemarker.com/blog/building-material-size-labeling-guide): Building-material size labeling needs a fixed template: nominal vs actual size, tolerance, and joint spacing for every tile, panel, and profile SKU. - [Catalog Images That Convert for Building-Material Exporters](https://www.sizemarker.com/blog/catalog-images-building-material-export-orders): Catalog images that convert start with one spec layout per SKU. See how a building-material exporter cut quote turnaround and back-and-forth emails in half. - [How Clear Spec Images Cut Returns: Building-Material Exports](https://www.sizemarker.com/blog/clear-spec-images-cut-building-material-disputes): How clear spec images cut returns and export disputes: the freight-cost math and a pre-shipment spec-confirmation workflow that prevents wrong-size containers. - [How to Look Professional to Overseas Buyers: 6 Image Fixes](https://www.sizemarker.com/blog/professional-product-images-overseas-buyers-trust): How to look professional to overseas buyers starts with your images: six common mistakes quietly cost new suppliers trust, inquiries, and orders. - [How to Build a Spec Diagram for Industrial Products](https://www.sizemarker.com/blog/industrial-product-spec-diagram-dimensions): A spec diagram for industrial products states the exact dimensions, tolerances, and hole spacing buyers need before they order. - [How to Reduce Pre-Sale Questions About Size: Label the Image](https://www.sizemarker.com/blog/reduce-pre-sale-size-questions): How to reduce pre-sale questions about size: audit repeat inquiries, then label the exact dimensions buyers keep asking for right on the image. - [How Spec Sheets Win B2B Orders, and Close Inquiries Faster](https://www.sizemarker.com/blog/spec-sheets-win-b2b-orders): How spec sheets win B2B orders: a clear dimension diagram qualifies buyers, collapses the email chain, and beats a cheaper quote, stage by stage. - [Furniture Return Rate: Why Size Drives It (and the Fix)](https://www.sizemarker.com/blog/furniture-return-rate): The furniture return rate runs 15-20%, but size drives the costly ones. See what a single return really costs and the one image that prevents it. - [How to Show Furniture Dimensions in Photos](https://www.sizemarker.com/blog/furniture-dimensions-in-photos): How to show furniture dimensions in photos so overseas buyers see size at a glance: what to label per furniture type, dual units, and a pre-publish checklist. - [Jewelry Size Guide for Rings, Necklaces, Bracelets](https://www.sizemarker.com/blog/jewelry-size-guide): Use this jewelry size guide to show ring, necklace, bracelet, and earring dimensions clearly and reduce avoidable size returns. - [Batch Product Photography: Shoot 50+ SKUs in One Day](https://www.sizemarker.com/blog/batch-product-photography-50-skus): A practical batch product photography workflow for shooting 50+ SKUs with consistent lighting, filenames, quality control, and exports. - [A/B Testing Product Images That Convert](https://www.sizemarker.com/blog/ab-testing-product-images): Learn how to run product image A/B testing on Amazon, Shopify, and marketplaces without misreading noisy conversion data. - [Google Shopping Image Disapproval Fixes](https://www.sizemarker.com/blog/google-shopping-image-disapproval-fixes): Fix Google Shopping image disapprovals caused by small files, overlays, variant mismatches, crawler errors, and stale URLs. - [Etsy Listing Photo Safe Zone Guide](https://www.sizemarker.com/blog/etsy-listing-photo-safe-zone): Use this Etsy listing photo safe zone workflow to prevent cropped thumbnails, blurry search cards, and weak product galleries. - [eBay Fashion Size Standardization 2026](https://www.sizemarker.com/blog/ebay-fashion-size-standardization-2026): eBay fashion size standardization starts in June 2026. Use this seller audit workflow to fix size fields before July enforcement. - [International Size Conversion: US, UK, EU, JP, CN Charts for 2026](https://www.sizemarker.com/blog/international-size-conversion-charts): Cross-border clothing and shoe size charts for US, UK, EU, JP, and CN — plus the math, the common mistakes, and how to display multiple regions on one listing. - [White Background Product Photography: The Complete DIY Setup Guide](https://www.sizemarker.com/blog/white-background-product-photography-diy-setup): Build a pure white RGB(255,255,255) product photo setup for under $200. Step-by-step SOP with the gear list, two-light geometry, camera settings, and post-processing. - [Anatomy of a High-Converting Amazon Listing: Image Stack Breakdown](https://www.sizemarker.com/blog/amazon-listing-image-stack-breakdown): Each of the 7 Amazon image slots has a job. Here is the slot-by-slot anti-pattern gallery, with conversion data showing why the order matters more than seller polish. - [Walmart Marketplace Product Image Requirements: A Seller's Guide](https://www.sizemarker.com/blog/walmart-product-image-requirements): Walmart vs Amazon vs eBay vs Shopify image specs in one comparison table, plus Walmart-specific rules: 1:1 aspect, RGB(255,255,255) hero, Polaris content scoring, and rejection fixes. - [How to Calculate Your True Product Photography ROI](https://www.sizemarker.com/blog/product-photography-roi-calculation): A practical decision guide for e-commerce product photography spend: calculate ROI by SKU revenue tier, factor in conversion lift and return rate, and avoid common payback miscalculations. - [The Buyer's Perspective: What Online Shoppers Wish Product Listings Showed](https://www.sizemarker.com/blog/buyer-perspective-product-listing-needs): A 2026 data report on what online shoppers wish e-commerce listings showed before they bought — color accuracy, scale, material, contents, and use context, ranked by buyer feedback. - [Lifestyle Product Photography: 6 Scenarios That Sell](https://www.sizemarker.com/blog/lifestyle-product-photography-that-sells): Six practical lifestyle photography scenarios for e-commerce (desktop, in-home, on-model, outdoor, studio-hybrid, UGC) with budgets, shot lists, and decision matrix. - [Amazon Infographic Images That Convert: 12 Anti-Patterns to Avoid](https://www.sizemarker.com/blog/amazon-infographic-images-that-convert): Twelve common Amazon infographic mistakes that hurt conversion, plus the 5 infographic types that actually work. Mobile-first rules, checklist, and FAQ for 2026. - [Shopify Product Image Best Practices: Sizes, Formats, and Speed](https://www.sizemarker.com/blog/shopify-product-image-best-practices): Complete 2026 guide to Shopify product image sizes (2048x2048), formats (JPEG/PNG/WebP), file size targets, theme compatibility, alt text SEO, and variant setup. - [15 Free Tools Every E-commerce Seller Needs in 2026](https://www.sizemarker.com/blog/free-ecommerce-seller-tools-2026): 15 tools for e-commerce sellers organized by workflow: design, background removal, editing, keywords, pricing, and operations. Each rated with free vs paid scope and best-fit stage. - [The Hidden Cost of Product Returns: A Full Breakdown](https://www.sizemarker.com/blog/hidden-cost-of-ecommerce-returns): A single return costs -30, not just shipping. Full cost breakdown by component, ROI comparison of reducing returns vs. pushing more sales, and five actions to lower return rates. - [Product Dimension Annotations: How Top Sellers Show Size](https://www.sizemarker.com/blog/product-dimension-annotation-guide): Six common dimension annotation mistakes on product images, with fixes. Covers line style, contrast, consistency, reference objects, and a complete annotation workflow. - [Selling on Multiple Platforms: A Practical Multi-Channel Guide](https://www.sizemarker.com/blog/multi-platform-selling-practical-guide): Full comparison of Amazon, Shopify, eBay, Etsy and Walmart across image specs, fees, fulfillment, and audience. Includes a sustainable workflow for running multiple channels. - [Why Most Online Fashion Returns Are Size-Related (And How to Fix It)](https://www.sizemarker.com/blog/fashion-returns-size-related-data): Data-driven analysis of fashion returns: 52-58% are fit issues. Includes real cost breakdowns, 5 proven fixes, and a case study showing 35% to 22% return rate reduction. - [How to Create a Size Chart That Actually Reduces Returns](https://www.sizemarker.com/blog/size-chart-that-reduces-returns): A ready-to-use size chart template with measurement instructions, category examples for apparel/footwear/bags/furniture, and placement tips to reduce fit-related returns. - [How to Shoot Professional Product Photos with Just a Smartphone](https://www.sizemarker.com/blog/smartphone-product-photography-guide): A complete guide to shooting listing-ready product photos using only a smartphone and under $30 in equipment. Covers phone settings, DIY lightbox setup, lighting techniques, shooting angles, mobile editing apps, and category-specific tips for clothing, jewelry, electronics, food, and furniture. - [7 Hero Image Mistakes That Kill Your Amazon Click-Through Rate](https://www.sizemarker.com/blog/hero-image-mistakes-kill-amazon-ctr): The 7 most common Amazon hero image mistakes that destroy your click-through rate, with specific fixes for each: product fill, lighting, angle, color accuracy, white background, text violations, and resolution. - [Amazon Product Image Requirements in 2026: The Complete Seller's Checklist](https://www.sizemarker.com/blog/amazon-product-image-requirements-complete-guide): Complete guide to Amazon product image specifications including main image white background rules, secondary image best practices, size chart guidelines, common rejection reasons, and a pre-upload checklist. ## Legal - [Terms of Service](https://www.sizemarker.com/service/terms) - [Privacy Policy](https://www.sizemarker.com/service/privacy)