Jun 25, 2017 · LEGOs are metric. I use a 0.8 or 1.6 mm rule. Basic geometric bricks are made of only these dimensions. These are also ideal representational dimensions since we're not going to manufacture these. Studs are Ø4.8 by 1.6 high, one brick length/width is 8.0, brick height is 9.6, etc. See image below.