LEGO brick (2 x 4)
31.8 mm (1.252 in)
Length
The classic eight-stud building brick. Length: 31.8 mm.
Published
How big is that?
31.8 mm is 37% of a credit card.
LEGO brick is the 5th smallest of the 39 Classic objects, and the 5th smallest of the 109 objects across all three SizeItUp games.
Size comparison
To scale, smallest to largest: LEGO brick in orange beside the Classic objects nearest in size, in teal.
| Object | Size | vs LEGO brick |
|---|---|---|
| Nickel (US five cents)The US five-cent coin. | 21.21 mm across | 67% of the size |
| US quarterThe 25-cent coin of the United States. | 24.26 mm across | 76% of the size |
| LEGO brick (2 x 4) | 31.8 mm long | – |
| Table tennis ballA regulation ping-pong ball. | 40 mm across | 1.3× bigger |
| Golf ballA regulation ball for the game of golf. | 42.67 mm across | 1.3× bigger |
In other units
| Millimetres | 31.8 |
|---|---|
| Centimetres | 3.18 |
| Metres | 0.0318 |
| Inches | 1.252 |
| Feet | 0.1043 |
How it's measured
Length. Derived from the 8 mm stud pitch: 4 x 8 mm less 0.2 mm clearance. LEGO publishes no dimensions..
Sources
- brickfact.com: A 2 x 4 brick measures 31.8 x 15.8 x 9.6 mm plus the studs.
- en.wikipedia.org (supporting): LDraw: 1x1 brick real width is the 8 mm pitch less 0.2 mm (7.8 mm).
Checked against the source on .
Could you have guessed it by eye?
LEGO brick is one of the objects in Classic, a daily size comparison game: you stretch a shape to the size you think is right beside one you know.