There is no single best way to organize LEGO parts. LEGO itself lists several common approaches, including sorting by color, set, size, and part type. In practice, each method works best at a different collection size and for a different kind of builder.

Sorting by color: easy at first, frustrating later

Color is the most intuitive starting point. All red parts go in one bin, blue parts in another, and so on. For a small collection, that can work surprisingly well.

The weakness appears as the collection grows. A container full of hundreds of black parts can make it harder, not easier, to find one specific plate, hinge, or modified brick.

Sorting by part type: better for active builders

For MOC builders, grouping by function is usually more efficient: bricks, plates, tiles, slopes, hinges, clips, bars, Technic elements, wheels, windows, and decorative parts.

The advantage is retrieval speed. If you need a hinge, you know where to look regardless of color. The tradeoff is that the system needs more containers and more discipline when parts are put away.

Sorting by set: ideal for collectors who rebuild

If your main goal is preserving complete sets, keeping each set together can be the simplest system. A dismantled model can stay in its own labeled box or bag, ideally with instructions and any relevant extras.

This makes rebuilding and resale easier, but it is much less convenient if you regularly borrow parts for custom builds.

Sorting by size can be a useful middle ground

Size-based organization works well when a collection has outgrown a few mixed bins but is not large enough to justify dozens of categories. Small elements can be separated from medium and large pieces, then divided further as needed.

For large collections, hybrid systems usually win

A practical larger setup might separate:

• basic bricks,
• plates,
• tiles,
• slopes,
• Technic,
• very small modified parts,
• minifigures and accessories,
• rare or valuable elements.

Color can then become a second-level category only where volume justifies it. Instead of one giant “red” bin, you may eventually have red plates, red slopes, and red bricks in separate sections.

When should you make the system more detailed?

The best signal is not total piece count but search time. If you regularly dump out an entire bin just to find one part, the category is probably too broad.

On the other hand, over-sorting creates its own friction. A system with hundreds of tiny categories can make cleanup so slow that parts stop getting returned to the right place.

Technic often deserves its own section

Pins, axles, liftarms, gears, and connectors form a functionally distinct family. Builders who use mechanical systems frequently can save a lot of time by separating Technic from standard System elements.

Minifigures and accessories are easier to manage separately

If keeping characters complete matters, it makes sense to store minifigure parts away from ordinary building elements. Heads, torsos, legs, hair, helmets, weapons, tools, and other accessories can then be subdivided further if the collection is large enough.

Choose containers to fit the system, not the other way around

LEGO mentions clear containers, hobby and tool boxes, bags, drawer systems, and other storage options. The right choice depends on collection size and how frequently categories are accessed.

Clear drawers are useful for frequently used parts, while larger closed bins may make more sense for complete sets or rarely used categories.

Labels become more valuable as the system grows

You do not need catalog IDs on every drawer. Simple labels such as “tiles,” “slopes,” “clip/bar,” “Technic pins,” or “minifig accessories” are often enough to keep a medium-sized system understandable.

The key takeaway

The best sorting system is the one that reduces the time between having an idea and finding the part you need. Collectors may prefer set-based storage. MOC builders usually benefit from part-type organization. For most growing collections, a hybrid system is the easiest to expand without reorganizing everything from scratch.