Sizing Chart Easton E400 Helmet
| Helmet Size | Hat Size | Circumference (cm.) | Circumference (in.) |
| X-Small | 6 3/8 - 6 3/4 | 51 - 54 | 20" - 21.25" |
| Small | 6 5/8 - 7 | 53 - 56 | 20.75" - 22" |
| Medium | 6 7/8 - 7 1/4 | 55 - 58 | 21.5" - 22.75" |
| Large | 7 1/4 - 7 5/8 | 57 - 61 | 22.25" - 24" |
| X-Large | 7 1/2 - 7 7/8 | 60 - 63 | 23.25" - 24.75" |