LEGO Parts Guide - Brick Architect

Explore the wide range of unique LEGO parts, discover parts you might have overlooked, and build something awesome!

This guide is by Tom Alphin, author of The LEGO Architect.

The LEGO Parts Guide — the book!

A brand new print edition of this guide adds clear chapter text, detailed technical drawings, and a splash of history. It's time to learn how LEGO really works.

→ Learn more!

Learn more and be the first to know when the book is complete...

Parts By Category

Most Common Parts

CURRENT

See the most common parts used in LEGO sets released in the past 5 years.

ALL YEARS

Explore parts used in LEGO sets across The LEGO Group's 70+ year history.

The LEGO Parts Guide is a work in progress

This is a handcrafted experience to help you browse LEGO parts in a simpler way. If you have ideas to make it better or encounter any issues, please send me an email at tom@tomalphin.com — Thanks!

Check out the About the LEGO Parts Guide page to learn more about why I created this guide. It also includes a detailed version history with images of early prototypes of this guide.

Support the LEGO Parts Guide

The LEGO Parts Guide is an extension of my LEGO Brick Labels project. If you want to support this project and gain access to behind-the-scenes updates, consider supporting the project at patreon.com.

The LEGO® Parts Guide. © 2026 Brick Architect LLC.
Content and design by Tom Alphin. Use of this content without permission is prohibited.
brickarchitect.com

Brick Architect earns a commission from qualifying purchases at partner sites such as LEGO.com and Amazon. (For a complete list of affiliate programs, visit About Brick Architect.)

LEGO® is a trademark of the LEGO Group which does not sponsor, authorize or endorse this site. As a member of the Recognized LEGO® Fan Media program, we abide by the LEGO Fair Play and Novelty policies by not sharing leaked photos of unreleased sets.

This guide uses external data from Rebrickable, BrickLink, Brickset, and LDraw.