| Obrien Wakeboard Boots Sizing Chart | ||||||
| Men | XS | SM | M | L | XL | XXL |
| USA | 5.0 - 6.5 | 6.5 - 7.5 | 8.0 - 9.0 | 9.5 - 10.5 | 11.0 - 12.0 | 13.0 + |
| UK | 4.0 - 5.5 | 5.5 - 6.5 | 7.0 - 8.0 | 8.5 - 9.5 | 10.0 - 11.0 | 12.0 + |
| EUR | 37.0 - 38.5 | 38.5 - 40.0 | 40.5 - 42.0 | 42.5 - 44.0 | 44.5 - 45.5 | 47.0 + |
| CM | 23.0 - 24.5 | 24.5 - 25.5 | 26.0 - 27.0 | 27.5 - 28.5 | 29.0 - 30.0 | 31.0 + |
| Women | XS | SM | M | L | ||
| USA | 5.0 - 5.5 | 6.0 - 6.5 | 7.0 - 8.5 | 9.0 - 10.0 | ||
| UK | 2.5 - 3.0 | 3.5 - 4.0 | 4.5 - 6.0 | 6.5 - 7.5 | ||
| EUR | 35.0 - 35.5 | 36.0 - 37.0 | 37.5 - 39.0 | 40.0 - 41.0 | ||
| CM | 22.0 - 22.5 | 23.0 - 23.5 | 24.0 - 25.5 | 26.0 - 27.0 | ||