Fox Helmet Size Chart 2021
| Helmets | XS | S | M | L | XL | XXL |
| Head Circumference | 20 7/8"- 21 1/4" | 21 1/4"- 22 1/8" | 22 3/8"- 23 1/8" | 23 1/4"- 23 3/4" | 23 1/8"- 24 3/4" | 24 1/8"- 25 3/4" |
| Hat Size | 6 5/8 - 6 7/8 | 6 7/8 - 7 1/8 | 7 1/8 - 7 3/8 | 7 3/8 - 7 5/8 | 7 5/8 - 7 7/8 | 7 7/8 - 8 1/4 |
| Rampage Pro Carbon | XS | S | M | L | XL | XXL |
| Head Circumference | 20 7/8"- 21 1/4" | 21 5/8"- 22" | 22 1/5"- 23 7/8" | 23 1/4"- 23 5/8" | 24"- 24 3/8" | 24 5/8"- 25 1/8" |
| Hat Size | 6 5/8 - 6 7/8 | 6 7/8 - 7 | 7 1/8 - 7 1/4 | 7 3/8 - 7 1/2 | 7 5/8 - 7 3/4 | 7 7/8 - 8 |
| Striker / Flux | XS / S | S / M | L / XL |
| Head Circumference | 21 1/2"- 21 3/4" | 21 7/8"- 23 1/8" | 23 1/4"- 23 3/4" |
| Transition | S/M | L/XL |
| Head Circumference | 21 7/8"- 23 1/8" | 23 1/4"- 24 3/4" |
| Transition HardShell | S | M | L |
| Head Circumference | 20 1/2"- 21 1/4" | 21 2/3"- 22 3/4" | 23 1/4"- 24" |
*With tape measure level, measure the widest part of your head approximately 1" above your eyebrows.