Troxel Helmets
| HEAD SIZE | HEAD SIZE | HELMET SIZE |
|---|---|---|
| INCHES | CM | |
| 21 1/8'' | 54 | 6 3/4 |
| 21 1/2'' | 55 | 6 7/8 |
| 21 7/8'' | 56 | 7 |
| 22 1/4'' | 57 | 7 1/8 |
| 22 5/8'' | 58 | 7 1/4 |
| 23'' | 59 | 7 3/8 |
| 23 1/2'' | 60 | 7 1/2 |
| 23 7/8'' | 61 | 7 5/8 |
| 24 1/4'' | 62 | 7 3/4 |
| 24 5/8'' | 63 | 7 7/8 |
| 25'' | 64 | 8 |
| 25 1/2'' | 65 | 8 1/8 |