The LEGO bricks are precisely designed to fit perfectly together. There is a 0.2mm gap between bricks next to each other. The gap between two bricks stacked on top of each depends on how careful to pressed them down. Of course there are several websites that show you the exact measurements, but some of them were a bit confusing or even broken.

## LEGO 2×4 Brick (3001)

I enjoy working in 3D so I used Fusion 360 to create this technical drawing of the LEGO Brick. You can download the model over at GrabCAD and the PDF file from here.

lego-2×4-brick-dimensions-measurements-3001## LEGO 2×4 Plate (3020)

This plate is 1/3 of the height of a normal brick. You can download the model at GrabCAD and the the PDF file from here.

lego-2×4-plate-dimensions-measurements-3020## LEGO 1×4 Technic Brick (3701)

The technic bricks have a hole in the side for pin connectors or axles to go through. I had to cut open a brick to get the exact design of the inside tubes right. The model is available at GrabCAD and the PDF file from here.

lego-1×4-technic-brick-dimensions-measurements-3701
Hi. By inspecting the Plate vs the Brick, it looks like the walls are thicker. Is it possible, that the 0.6×0.2 elevations create the same thickness, so the walls at the plates are 1.4mm?

The walls of the technic brick are certainly thicker (1.4mm). I confirmed this by measuring them myself. The walls of the 2×4 brick and 2×4 plate seem to be identical: 1.2mm. I am not sure what you mean with the 0..6×0.2 elevation.

Please do more parts like this. I enjoy using inventor and making my own creations. A bit difficult measuring it myself. What you have done so far is very helpful. Thanks

Thank you for these lego parts they really helped me with my school work. Can you please make more it would really be appreciated. Thank you very much .

The links to the PDF files don’t work.

Hi Mike, one link was indeed broken to the PDF file. It is now fixed.

Everybody says that the hight is 0.96 cm. But it’s not. I stacked 200 bricks and measured the hight and got 191.2 cm (if you multiply 0.96 by 200 you get 192 cm). So the hight is more like 0.956 cm.

You might say that’s just 0.04 mm difference. But when you stack 200 bricks that difference sums up to almost a centimeter (0.8 cm)

In reference to the wall thickness question – It varies! The variation is quite simple, and not related to regular vs Technic bricks. As far as I can tell, plates and 1xn bricks have a wall thickness of 1.5 mm, as in your Technic brick drawing (not quite the 1.6 advertised in other forums). For mxn bricks (where m>1 and n > 1) the wall thickness is 1.2 mm (as you have shown), and the missing space is made up by the little nubs, which you show.

A note on the horizontal dimensions. I was bothered by the 15.8*31.8 rather than 16*32, so I decided to do some tests. I believe there is definitely a allowance for play, as implied in these drawings. None of my bricks are exactly integer width and length. I measured 24 different bricks and plates. I believe the linear dimensions for width and height are exactly 8.00 mm * number of studs – 0.2 mm. When I apply this formula across my 48 measurements (24*2) I get a standard distribution of 0.016 mm. It cleanly explains 15.8 and 31.8 as well as the fact that the corner stud center is 3.9 mm and not an even 4.0 which you would expect given stud separations of 8.0

Thank you! This helped a lot. I just have one question. Are the measurement in mm?

Sorry if you answered this already.

Yes they are in mm.

Extraordinarily helpful. Thank you so much for your time and effort!