| ARO3 | ARO3 | ARO3 | ARO5 | ARO5 | ARO5 | |
| Size | S | M | L | S | M | L |
| Head Circumference (In) | 20-22 | 22-23 | 23-24 | 20-22 | 22-23 | 23-24 |
| Head Circumference (Cm) | 52-56 | 55-59 | 58-62 | 52-56 | 55-59 | 58-62 |
| Helmet Weight XE(g) | 251 | 269 | 271 | 264 | 288 | 305 |
| Hellmet Weight CPSC(g) | 275 | 295 | 313 | 279 | 300 | 323 |
| Heigth Weight AS/NZS(g) | 275 | 295 | 313 | 279 | 300 | 323 |
How to Measure:
Use a flexible tape measure and wrap it around your head just at the top of the brow and around the temples.