Building materials · Reference

Standard Brick Dimensions (2026): US, UK & EU Sizes

The UK/EU standard brick is 215 × 102.5 × 65 mm — or 225 × 112.5 × 75 mm with a 10 mm mortar joint. The US modular brick is 8 × 4 × 2 2/3 in nominal, about 7 5/8 × 3 5/8 × 2 1/4 in (194 × 92 × 57 mm) actual.

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A brick is specified by three dimensions in length × width (bed depth) × height order, measured on the unit as laid as a stretcher.

Key facts

The UK/EU standard brick work size is 215 × 102.5 × 65 mm (8.46 × 4.03 × 2.56 in); with a 10 mm mortar joint the coordinating size is 225 × 112.5 × 75 mm (BS EN 771-1).
The US modular brick has a nominal size of 8 × 4 × 2 2/3 in (203 × 102 × 68 mm); the specified/actual unit is 7 5/8 × 3 5/8 × 2 1/4 in (194 × 92 × 57 mm) with a 3/8 in joint (BIA TN 10).
Nominal = unit plus mortar joint, rounded to 4-in / 8-in (or 100 mm) modules; specified/actual = the manufactured unit only. Non-modular US bricks (Queen, King, Standard) have no nominal size.
China's standard clay brick is 240 × 115 × 53 mm (9.45 × 4.53 × 2.09 in, GB/T 5101); India's modular brick per IS 1077 is 190 × 90 × 90 mm (7.48 × 3.54 × 3.54 in).
US Standard brick is 8 × 3 5/8 × 2 1/4 in (203 × 92 × 57 mm) and Queen is roughly 7 5/8–8 × 2 3/4–3 × 2 3/4 in — both non-modular sizes per BIA TN 10.

UK & EU standard brick — work size vs coordinating size

Size	Length	Width	Height
Work size (unit only, BS EN 771-1)Manufacturer's declared size of a standard UK clay brick	215 mm / 8.46 in	102.5 mm / 4.03 in	65 mm / 2.56 in
Coordinating size (incl. one 10 mm joint)Work size + 10 mm mortar joint; four courses = 300 mm	225 mm / 8.86 in	112.5 mm / 4.43 in	75 mm / 2.95 in

Source: Brick Development Association — Designing to Brickwork Dimensions (BS EN 771-1) (2023)

US brick sizes — nominal (incl. mortar) vs specified/actual unit

Brick type	Nominal (incl. mortar)	Specified / actual (unit only)
ModularVertical coursing 3C = 8 in (203 mm)	8 × 4 × 2 2/3 in (203 × 102 × 68 mm)	7 5/8 × 3 5/8 × 2 1/4 in (194 × 92 × 57 mm)
Engineer Modular5C = 16 in (406 mm)	8 × 4 × 3 1/5 in (203 × 102 × 81 mm)	7 5/8 × 3 5/8 × 2 13/16 in (194 × 92 × 71 mm)
Closure Modular	8 × 4 × 4 in (203 × 102 × 102 mm)	7 5/8 × 3 5/8 × 3 5/8 in (194 × 92 × 92 mm)
Norman	12 × 4 × 2 2/3 in (305 × 102 × 68 mm)	11 5/8 × 3 5/8 × 2 1/4 in (295 × 92 × 57 mm)
Queen (non-modular)Specified range varies by maker	— (non-modular)	7 5/8–8 × 2 3/4–3 × 2 3/4 in (194–203 × 70–76 × 70 mm)
Standard (non-modular)	— (non-modular)	8 × 3 1/2–3 5/8 × 2 1/4 in (203 × 89–92 × 57 mm)

Source: Brick Industry Association — Technical Notes 10, Table 1 & Fig. 3 (2009)

Other regional common brick sizes

Region / standard	Length	Width	Height
China standard brick (GB/T 5101)	240 mm / 9.45 in	115 mm / 4.53 in	53 mm / 2.09 in
India modular brick (IS 1077)Also 190 × 90 × 40 mm half-height	190 mm / 7.48 in	90 mm / 3.54 in	90 mm / 3.54 in
India non-modular / conventional (IS 1077)	230 mm / 9.06 in	110 mm / 4.33 in	70 mm / 2.76 in

Source: China: GB/T 5101 (via block-machine.net) · India: IS 1077:1992 (via Comaron)

Put these numbers on the product photo

A spec table only helps if the buyer reads it. Many don't — shoppers routinely try to judge a product's size straight from the images, and wrong size or fit is the most-cited reason things get returned. The fix is to mark the real dimensions on the photo itself, where the buyer is already looking.

SizeMarker snaps dimension lines to the brick's edges and exports at Amazon or Alibaba size, so the measurement is accurate and legible — not a guess typed over the picture. That answers the size question up front and cuts pre-sale questions and size-driven returns.

FAQ

What is the standard brick size?

In the UK and EU a standard brick is 215 × 102.5 × 65 mm (8.46 × 4.03 × 2.56 in) per BS EN 771-1. In the US the most common (modular) brick has a nominal size of 8 × 4 × 2 2/3 in (203 × 102 × 68 mm).

What is the difference between nominal, specified and actual brick size?

Per BIA Technical Notes 10, the nominal size is the specified unit plus its mortar joint, rounded to 4-in or 8-in modules; the specified size is the manufactured size without mortar (used on purchase orders); and the actual size is the as-made size, within ASTM C216 tolerances.

What is the US modular brick size in mm?

The US modular brick is 8 × 4 × 2 2/3 in nominal (203 × 102 × 68 mm). Its specified/actual size with a 3/8 in joint is 7 5/8 × 3 5/8 × 2 1/4 in, or 194 × 92 × 57 mm (BIA TN 10).

What is the coordinating size of a UK brick?

Adding a 10 mm mortar joint to the 215 × 102.5 × 65 mm work size gives a coordinating size of 225 × 112.5 × 75 mm, so four courses equal 300 mm (Brick Development Association).

What size are Queen and King bricks?

Both are non-modular US sizes with no nominal dimension. A Queen brick is about 7 5/8–8 × 2 3/4–3 × 2 3/4 in and a King brick about 9 5/8–9 3/4 × 2 3/4–3 × 2 5/8–2 3/4 in, varying by maker (BIA TN 10, Fig. 3).

What is the standard brick size in China and India?

China's standard clay brick is 240 × 115 × 53 mm (9.45 × 4.53 × 2.09 in, GB/T 5101). India's modular brick per IS 1077 is 190 × 90 × 90 mm (7.48 × 3.54 × 3.54 in), with a common non-modular size of 230 × 110 × 70 mm.

Sources & method

Every figure on this page is traced to a named source, linked under each table. Standard sizes come from published standards and established industry references; where a size is a typical range or varies by manufacturer, we say so. Sizes vary by region, model and revision — treat these as the standard reference, and confirm the exact spec of the item you are selling.

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