| SIZE | INCHES | CM | HAT SIZE |
| SMALL | 19 5/8 | 50 | 6 1/4 |
| MEDIUM | 20 1/2 | 52 | 6 1/2 |
| LARGE | 21 1/4 | 54 | 6 3/4 |
| SIZE | INCHES | CM | HAT SIZE |
| X-SMALL | 21 1/4 - 21 5/8 | 54-55 | 6 3/4 - 6 7/8 |
| SMALL | 21 5/8 - 22 | 55-56 | 6 7/8 - 7 |
| MEDIUM | 22 3/8 - 22 3/4 | 57-58 | 7 1/8 - 7 1/4 |
| LARGE | 23 1/8 - 23 1/2 | 59-60 | 7 3/8 - 7 1/2 |
| X-LARGE | 24 - 24 3/8 | 61-62 | 7 5/8 - 7 3/4 |
| XX-LARGE | 24 3/8 - 24 3/4 | 62-63 | 7 3/4 - 7 7/8 |