Returns
How to Calculate Return Rate: 5 Ways the Number Lies
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.
Field Notes
Tips and guides for adding size annotations to your product images
Size & Fit
Dining Chair Seat Height: The 10-Inch Rule and Its Limits
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.
B2B & Suppliers
H7/h6 Fit Tolerance: Clearance, Not Transition
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.
Seller Growth
WhatsApp Business Catalog Image Size: 500 px Is Not Enough
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.
Photography
How to Photograph Large Furniture in a 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.
Compliance
ISPM 15 Marking Requirements: 6 Stamps That Fail at Customs
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.
Returns
Restocking Fee Rules by Marketplace: Who Can Charge What
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.
Photography
How to Photograph Reflective Metal Products: 6 Myths
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.
B2B & Suppliers
Gear Module vs Diametral Pitch: 25.4 Is Not a Fit
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.
Photography
Product Photo Color Accuracy: 5 Places the Color Breaks
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.
Compliance
Type X vs Type C Drywall: One Isn't in the Standard
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.
B2B & Suppliers
JIC vs ORFS vs BSP: The Fitting That Screws On and Leaks
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.