| SIZE | HEAD CIRCUMFERENCE (CM) | HEAD CIRCUMFERENCE (IN.) | HAT SIZE |
| XS | 53-54 | 20 7/8 - 21 1/4 | 6 5/8 - 6 3/4 |
| S | 55-56 | 21 5/8 - 22 | 6 7/8 - 7 |
| M | 57-58 | 22 1/2 - 22 | 7 1/8 - 7 1/4 |
| L | 59-60 | 23 1/4 - 23 5/8 | 7 3/8 - 7 1/2 |
| XL | 61-62 | 24 - 24 3/8 | 7 5/8 - 7 3/4 |
| XXL | 63-64 | 24 3/4 - 25 1/8 | 7 7/8 - 8 |