| Adult Helmet Sizing | Size (cm) | Size (in) | Liner Size |
| XS | 53 - 54 | 20 7/8 - 21 1/4 | 14mm |
| S | 55 - 56 | 21 5/8 - 22 | 12mm |
| M | 57 - 58 | 22 1/2 - 22 7/8 | 12mm |
| L | 59 - 60 | 23 1/4 - 23 5/8 | 14mm |
| XL | 61 - 62 | 24 - 24 3/8 | 14mm |
| XXL | 24 3/4 - 25 1/4 |
| Adult Helmet Sizing | Size (cm) | Size (in) |
| S | 52 - 56 | 20 1/2 - 22 |
| M | 56 - 58 | 22 - 22 7/8 |
| L | 58 - 61 | 22 7/8 - 24 |
| XL | 61 - 64 | 24 - 25 1/4 |
| Adult Helmet Sizing | Size (cm) | Size (in) |
| XS/S | 50 - 55 | 19 5/8 - 21 5/8 |
| S/M | 55 - 59 | 21 5/8 - 23 1/4 |
| L/XL | 59 - 63 | 23 1/4 - 24 3/4 |
| Youth Helmets Sizing | Size (cm) |
| S | 47- 48 |
| M | 49- 50 |
| L | 51 - 52 |