| HJC Helmet Standard Sizes |
|---|
| Size | Centimeters | Inches | Hat Size |
| Childs S/M | 50 - 52cm | 19 3/4 - 20 1/8" | 6 1/4 - 6 1/2 |
| Childs L/XL | 53 - 54cm | 20 1/4 - 21 1/4" | 6 5/8 - 6 3/4 |
| XXX Small | 49 - 50cm | 19 1/4 - 19 3/4" | 6 1/8 - 6 1/4 |
| XX Small | 51 - 52cm | 20 - 20 1/2" | 6 3/8 - 6 1/2 |
| X Small | 53 - 54cm | 20 7/8 - 21 1/4" | 6 5/8 - 6 3/4 |
| Small | 55 - 56cm | 21 3/8 - 22" | 6 7/8 - 7 |
| Medium | 57 - 58cm | 22 1/4 - 22 7/8" | 7 1/8 - 7 1/4 |
| Large | 59 - 60cm | 23 1/4 - 23 5/8" | 7 3/8 - 7 1/2 |
| X Large | 61 - 62cm | 24 - 24 1/2" | 7 5/8 - 7 3/4 |
| XX Large | 63 - 64cm | 24 3/4 - 25 1/4" | 7 7/8 - 8 |
| XXX Large | 65 - 66cm | 25 5/8 - 26" | 8 1/8 - 8 1/4 |
| RPHA Series, FG-Jet, FG-17 Helmet Size Chart |
|---|
| Size | Centimeters | Inches | Hat Size |
| X Small | 54 - 55cm | 21 1/4 - 21 5/8" | 6 3/4 - 6 7/8 |
| Small | 55 - 56cm | 21 8/8 - 22" | 6 7/8 - 7 |
| Medium | 57 - 58cm | 22 1/2 - 22 7/8" | 7 1/8 - 7 1/4 |
| Large | 58 - 59cm | 22 7/8 - 23 1/4" | 7 1/4 - 7 3/8 |
| X Large | 60 - 61cm | 23 5/8 - 24" | 7 1/2 - 7 5/8 |
| XX Large | 62 - 63cm | 24 3/8 - 24 3/4" | 7 3/4 - 7 7/8 |
| XXX Large | 64 - 65cm | 25 1/4 - 25 5/8" | 8 - 8 1/8 1/4 |
The sizing information is provided by the manufacturer and does not guarantee a perfect fit. However, we are happy to assist you with any needed exchanges.Note: the RPHA-Max seems to run a little smaller due to the thick padding and smaller overall shell design. Most size exchanges have been to up a size. So if you are on the fence. We recommend thinking about going up a size to start. However, please keep in mind the padding will break in some and a helmet that is a little tight vs. too loose for safety.
