| HEAD SIZE (CM) | HEAD SIZE (IN) | HELMET SIZE | SKULL CAP SIZE |
| 49 | 19.3 | 6 | 0 |
| 50 | 19.7 | 6 1/8 | 000 1/2 |
| 51 | 20.1 | 6 1/4 | 0 |
| 52 | 20.5 | 6 3/8 | 00 1/2 |
| 53 | 20.9 | 6 1/2 | 0 |
| 54 | 21.3 | 6 5/8 | 0 1/2 |
| 55 | 21.7 | 6 3/4 | 1 |
| 56 | 22.0 | 6 7/8 | 1 1/2 |
| 57 | 22.4 | 7 | 2 |
| 58 | 22.8 | 7 1/8 | 2 1/2 |
| 59 | 23.2 | 7 1/4 | 3 |
| 60 | 23.6 | 7 3/8 | 3 1/2 |
| 61 | 24.0 | 7 1/2 | 4 |
| 62 | 24.4 | 7 5/8 | 4 1/2 |
| 63 | 24.8 | 7 3/4 | 5 |
| 64 | 25.2 | 7 7/8 | 5 1/2 |
| 65 | 25.6 | 8 | 6 |