HJC Helmet Size Chart
| Size | Hat Size | Head Measurement |
|---|---|---|
| 2X-Small | 6 3/8–6 1/2 | 20"–20 1/2" |
| X-Small | 6 5/8–6 3/4 | 20 7/8"–21 1/4" |
| Small | 6 7/8–7 | 21 5/8"–22" |
| Medium | 7 1/8–7 1/4 | 22 1/2"–22 7/8" |
| Large | 7 3/8–7 1/2 | 23 1/4"–23 5/8" |
| X-Large | 7 5/8–7 3/4 | 24"–24 3/8" |
| 2X-Large | 7 7/8–8 | 24 3/4"–25 1/4" |
| 3X-Large | 8 1/8–8 1/4 | 25 5/8"–26" |
