Size Charts
Arai Helmets Size Charts
Sizing information is provided by the manufacturer and does not guarantee a perfect fit.
Adult Helmets
Wrap a cloth measuring tape around your head just above your eyebrows. Pull the tape comfortably snug, and read the length.
| Size | Head (in) | Head (cm) | |
|---|---|---|---|
| 2XS | 20 - 20 1/2 | 51 - 52 | |
| XS | 20 7/8 - 21 1/4 | 53 - 54 | |
| SM | 21 5/8 - 22 | 55 - 56 | |
| MD | 22 1/2 - 22 7/8 | 57 - 58 | |
| LG | 23 1/4 - 23 5/8 | 59 - 60 | |
| XL | 24 - 24 3/8 | 61 - 62 | |
| 2XL | 24 3/4 - 25 1/8 | 63 - 64 | |
| 3XL | 25 1/2 - 26 | 65 - 66 |
Interior Comfort Lining Cheekpad / Ear Cup Thickness
| Helmet | Cheekpads (mm) | Ear Cup (mm) | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Size | RX-7 Series | Quantum Series | Astral Series | Vector Series | Signet Series | VX-PRO | MXC-PRO | XD | Profile | Classic/m | SZ/m | SZ RAM III |
| Optional | 40 | 40 | 35 | 35 | 40 | 35 | 40 | |||||
| 3XS | 35 | |||||||||||
| 2XS | 30 | |||||||||||
| XS | 35 | 35 | 35 | 35 | 30 | 30 | 35 | 30 | 35 | 30 | 35 | 35 |
| SM | 30 | 30 | 30 | 30 | 25 | 25 | 35 | 25 | 30 | 25 | 30 | 30 |
| MD | 30 | 30 | 30 | 30 | 25 | 25 | 35 | 25 | 30 | 25 | 30 | 30 |
| LG | 25 | 25 | 25 | 25 | 20 | 20 | 30 | 20 | 25 | 20 | 25 | 25 |
| XL | 25 | 25 | 25 | 25 | 20 | 20 | 30 | 20 | 25 | 20 | 25 | 25 |
| 2XL | 20 | 20 | 20 | 20 | 15 | 15 | 25 | 15 | 20 | 15 | 20 | 20 |
| 3XL | 15 | 15 | 20 | |||||||||
| Optional | 15 | 15 | 15 | 15 | 12 | 12 | 20 | 12 | 15 | 15 | 15 | |
| Optional | 12 | 12 | 12 | 12 | 15 | 12 | ||||||
Interior Lining Thickness
RX-7 Series, PRO Series, XD, SZ/RAM III, Signet-GTR, Quantum II, Profile
| Helmet Size | Lining Code | 12 mm | 10 mm | 7 mm | 5 mm |
|---|---|---|---|---|---|
| 3XS | I | Optional | Standard | Optional | Optional |
| 2XS | Optional | Optional | Standard | Optional | |
| XS | II | Optional | Standard | Optional | Optional |
| S | Optional | Optional | Standard | Optional | |
| M | III | Optional | Standard | Optional | Optional |
| L | Optional | Optional | Standard | Optional | |
| XL | IV | Optional | Optional | Standard | Optional |
| 2XL | Optional | Optional | Optional | Standard | |
| 3XL | V | Optional | Optional | Standard | Optional |
Sizing information is provided by the manufacturer and does not guarantee a perfect fit.
You will need to upgrade your flash viewer to view this content
