To determine the correct helmet size, wrap a measuring tape around your head, keeping the tape just above the ears and level front to back.
Adult Bike Helmets
| Helmet Sizing | Size (cm) | Size (in) |
| S | 52 - 56 | 20.5 - 22 |
| M | 56 - 58 | 22 - 23 |
| L | 58 - 61 | 23 - 24 |
| XL | 60 - 64 | 23.6 - 25.2 |
Kids Bike Helmets
| Helmet Sizing | Size (cm) | Size (in) |
| XS | 46 - 52 | 18 - 20.5 |
| S | 52 - 55 | 20.5 - 21.6 |
