The sides are numbered 1-4 from left to right.
| Code | Closing system | ||
|---|---|---|---|
| 01 | Without flaps | ||
| 10 | Full overlap square flaps | ||
| 11 | Reduced square flaps and one full flap | ||
| 12 | Reduced square flaps | ||
| 15 | Full overlap square flaps and hanger system | ||
| 20 | Tuck flap | ||
| 21 | Tuck flap and hanger system | ||
| 30 | Tuck flap, dust flaps with hooks | ||
| 40 | Side tuck flaps, without dust flaps | ||
| 41 | Side tuck flaps, with dust flaps | ||
| 45 | Square flap with joined dust flaps | ||
| 50 | Flaps with claw lock | ||
| 55 | Automatic closing (unglued) | ||
| 60 | Automatic closing (two-point gluing) | ||
| 61 | Automatic closing (two-point gluing) with full square flap | ||
| 70 | Sealing closing | ||
| 75 | Gabled lid with claw lock | ||
| 80 | Tuck flap and hollow dust flaps | ||
| 81 | Hollow dust flaps | ||
| 82 | Webbed "Rosette" closing system | ||
| 83 | "Rosette" closing system | ||
| 99 | Tuck flap with attached webbed dust flaps | ||