| Velikost | Obseg glave (cm) | Obseg glave (palci) |
| S | 54–56 cm | 21,2" – 22,0" |
| M | 56–58 cm | 22,0" – 22,8" |
| L | 58–60 cm | 22,8" – 23,6" |
| XL | 60–62 cm | 23,6" – 24,9" |
Tabela velikosti čelad RAD Skate
| Velikost | Obseg glave (cm) | Obseg glave (palci) |
| S | 54–56 cm | 21,2" – 22,0" |
| M | 56–58 cm | 22,0" – 22,8" |
| L | 58–60 cm | 22,8" – 23,6" |
| XL | 60–62 cm | 23,6" – 24,9" |