Identifying LEGO® set and part numbers

Identifying LEGO® set numbers

Over our long history, we’ve made loads of unique sets, many with similar names. We use numbers as a quick and convenient way to instantly identify any LEGO set. Numbers on the first sets we made were three digits long, but as we made more and more sets, we started using longer numbers. Currently, set numbers are five to seven digits long and are featured prominently on the box and instructions for the set.



You can also find the set number when you’re browsing LEGO.com.

Where can I use set numbers?

Once you’ve located the set number, you can search for it on LEGO.com, find the building instructions on our service website, or order replacement parts for the set on Bricks & Pieces.

Identifying 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 a four or five digit design number molded on the inside of the piece. The number will be small, so you may need to rotate the brick under bright light to see it. The design number along with the color is a great way to identify a piece.

Both element and design numbers can be entered on Bricks & Pieces to see if the part is available to buy.



They can be used to find parts on Pick a Brick too. Just enter the number into the search bar.