| HEAD (CM) | HEAD (IN) | UK | |
| S/M | 53-55.8 | 20.86-21.96 | 6.500-6.875 |
| M/L | 56.8-57.7 | 22.36-22.71 | 7-7.125 |
| L/XL | 58.7 | 23.11 | 7.25 |
| XL/XXL | 59.6-60.6 | 23.46-23.85 | 7.375-7.500 |
| HEAD (CM) | HEAD (IN) | UK | |
| S/M | 53-55.8 | 20.86-21.96 | 6.500-6.875 |
| M/L | 56.8-57.7 | 22.36-22.71 | 7-7.125 |
| L/XL | 58.7 | 23.11 | 7.25 |
| XL/XXL | 59.6-60.6 | 23.46-23.85 | 7.375-7.500 |