Sizing Chart Bauer IMS 11.0 Helmet
| Helmet Size | Circumference (cm.) | Circumference (in.) | Hat Size |
| X-Small | 50 - 54 | 19.5" - 21.5" | 6 1/4 - 6 3/4 |
| Small | 52 - 56 | 20.5" - 22" | 6 1/2 - 7 |
| Medium | 55 - 59 | 21.5" - 23.5" | 6 7/8 - 7 3/8 |
| Large | 58 - 63 | 23" - 25" | 7 1/4 - 7 7/8 |