| Helmetclava | S | M | L |
| US | 6 7/8 | 7 1/8 | 7 3/8 |
| inches* | 21 5/8 | 22 1/2 | 23 1/4 |
| centimeters* | 55 | 57 | 59 |
| * Measure from center of forehead around fullest part of head | |||
| Ninjaclava | S / M | L / XL | |
| US | 6 7/8 - 7 1/8 | 7 3/8 - 7 5/8 | |
| inches* | 21 5/8 - 22 1/2 | 23 1/4 - 24 | |
| centimeters* | 55 - 57 | 59 - 61 | |
| * Measure from center of forehead around fullest part of head | |||
| Option Balacava | S / M | L / XL | |
| US | 6 7/8 - 7 1/8 | 7 3/8 - 7 5/8 | |
| inches* | 21 5/8 - 22 1/2 | 23 1/4 - 24 | |
| centimeters* | 55 - 57 | 59 - 61 | |
| * Measure from center of forehead around fullest part of head | |||