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| Helmet sizing guide | |||
| Size | centimeters | inches | hat size |
| XS | 54 | 21.5 | 6 3/4 - 6 7/8 |
| SM | 56 | 22.25 | 7 - 7 1/8 |
| MD | 58 | 23 | 7 1/4 - 7 3/8 |
| LG | 60 | 23.75 | 7 1/2 - 7 5/8 |
| XL | 62 | 24.5 | 7 3/4 |