| Velikost | Obseg glave (cm) | Obseg glave (IN) |
| S | 52–55 cm | 20,4–21,6" |
| M | 56–59 cm | 22–23,2" |
| L – XL | 60–62 cm | 23,6–24,4" |
Tabela velikosti smučarskih čelad K2 Thrive
| Velikost | Obseg glave (cm) | Obseg glave (IN) |
| S | 52–55 cm | 20,4–21,6" |
| M | 56–59 cm | 22–23,2" |
| L – XL | 60–62 cm | 23,6–24,4" |