piece information - What is the wall thickness of a lego brick? - Bricks
Lego System: Introduction
LEGO® Storage Brick - Iconic orgnanizer - Nordic Houseware Group
What is the interference lock offset of a LEGO stud/hole such that it fits snugly into another piece? (i.e. What are the snap mechanism dimensions?) - Quora
Lego standard dimensions | Lego, Lego instructions, Lego art