Sizing Chart Bauer 4500 Helmet
| Helmet Size | Hat Size | Circumference (cm.) | Circumference (in.) |
| X-Small | 6 3/8 - 6 3/4 | 51 - 54 | 20" - 21.2" |
| Small | 6 3/4 - 7 1/8 | 54 - 57 | 21.2" - 22.4" |
| Medium | 7 - 7 1/2 | 56 - 59 | 22" - 23.2" |
| Large | 7 3/8 - 7 7/8 | 59 - 63 | 23.2" - 24.8" |
| X-Large | 7 3/4 - 8 1/8 | 61 - 65 | 24" - 25.6" |