| Type | Entries | Specific To |
| Similar Sets with Same Numbers | 634 | Sets |
| Similar Sets with Different Numbers | 1780 | Sets |
| Similar Gear with Different Numbers | 617 | Gear |
| Similar Parts with Similar Molds | 3028 | Parts |
| Similar Parts with Different Molds | 130 | Parts |
| Similar Part Assemblies with Different Colors | 512 | Parts |
| Same Books in Different Languages | 2830 | Books |
| Same Gear in Different Languages | 824 | Gear |
| Same Items with Similar Patterns | 6186 | All |
| Same Stickers with Different Catalog Entries | 302 | All |
| Minifigures with In-Set Variants | 414 | Minifigures |
| Minifigures with Stickered / Non-Stickered Matches | 377 | Minifigures |
| Door on Door Frame | 701 | Parts |
| Glass on Door Frame | 11 | Parts |
| Glass on Window | 608 | Parts |
| Tire on Wheel | 237 | Parts |
| Paired Parts | 9153 | Parts |
| Parts that Belong Together | 416 | Parts |
| Gear that Belong Together | 20 | Gear |
| Unsplit Part Variants | 616 | Parts |
| Sets Redesigned During Production | 147 | Sets |
Fits 