ProTec Helmets Size Chart
| Helmet Sizing | Head Circumference (CM) | Head Circumference (IN) | Hat Size |
|---|---|---|---|
| Youth Small | 47 - 51 | 18.5 - 20.0 | - |
| Youth Medium | 52 - 56 | 20.5 - 22.0 | - |
| XXX-Small | 47 - 49 | 18.5 - 19.3 | - |
| XX-Small | 49 - 51 | 19.3 - 20.0 | < 6 1/4 |
| X-Small | 52 - 54 | 20.5 - 21.3 | 6 1/2 - 3/4 |
| Small | 54 - 56 | 21.3 - 22.0 | 6 7/8 - 7 1/8 |
| Medium | 56 - 58 | 22.0 - 22.8 | 7 1/8 - 3/8 |
| Large | 58 - 60 | 22.8 - 23.6 | 7 3/8 - 5/8 |
| X-Large | 60 - 62 | 23.6 - 24.4 | 7 5/8 - 7/8 |
| XX-Large | 62 - 64 | 24.4 - 25.2 | 7 7/8 - UP |
