LEGO 1×1 brick and system grid (8 mm pitch) — dimension sheet
Source: Xem Studio, https://xemstudio.com/objects/lego-1x1-brick-grid/  (sheet CC BY 4.0)
Basis: Secondary source: Brighton Toy and Model Museum (copy of the maker's figures; the maker publishes none directly)
Catalog version: 2026-10-20

Overall (mm): length 8.0, width 8.0, height 9.6
- The LEGO system is built on an 8 mm square grid; a brick body is 9.6 mm tall, three plates of 3.2 mm.
- Numbers come from a museum write-up that cites LEGO's own patent for the 4.8 mm stud.
- No CAD file: the maker publishes only overall sizes, and a plain box or cylinder is not useful design geometry. The table is the published data; parts with real geometry have their own pages.
- Secondary source: the numbers come from a retailer or magazine copy of the maker's specification.

dimension  value
Grid (stud pitch)  8 mm
Brick body height  9.6 mm (three plates)
Stud height  1.6 mm
Stud diameter  4.8 mm nominal (LEGO patent WO2019106129); measured about 4.88–4.89 mm
Clearance  bricks are nominal grid multiples minus about 0.1 mm

Files elsewhere (not hosted by Xem Studio; license as stated by the publisher):
- Brighton Toy and Model Museum: Lego dimensions — web — Publisher's page; dimensions are facts — https://www.brightontoymuseum.co.uk/index/Lego_dimensions

No true-size file yet: the published figures do not fix the whole shape; a measured scan is planned.
API: https://xemstudio.com/api/geometry?object=lego-1x1-brick-grid