| SIZE (IN.) | X-SMALL | SMALL | MEDIUM | LARGE | X-LARGE | XX-LARGE | XXX-LARGE | XXXX-LARGE |
| HAT SIZE | 6.5 - 6.75 | 6.75 - 7 | 7 - 7.25 | 7.25 - 7.5 | 7.5 - 7.75 | 7.75 - 8 | 8 - 8.25 | 8.25 - 8.5 |
| CENTIMETERS | 53-54 | 55-56 | 57-58 | 59-60 | 61-61.5 | 62-62.5 | 63-64 | 65-66 |
| INCHES | 21 - 21.25 | 21.5 - 22 | 22.5 - 22.75 | 23.25 - 23.5 | 23.5 - 24 | 24 - 24.5 | 24.5 -25.25 | 25.25 - 26 |