Where Can I Find Lego Part Numbers

Just like our sets, each LEGO piece has a unique element number. For newer sets, element numbers are listed in the back of your set’s building instructions: In addition to the element number, many parts have afour or fivedigit design number molded on the inside of the piece.

How do I identify Lego parts?

LEGO bricks are measured and identified by the number of the studs they have on top. The smaller number always comes first, so you say “a 2-by-4 brick,” not “a 4-by-2 brick.” The width of a 1×1 LEGO brick is the Fundamental LEGO Unit, or module (1 module or 1M is about 8 mm).

Are all LEGO pieces marked?

There are no LEGO parts with studs that have no logo on them. The hollow versions of studs which are on technic bricks and many other bricks have the Lego logo printed on the insides.