MK8 (X) / Rental Helmets
| Size | Circumference (cm) |
| XS | 52 - 54 |
| S | 54 - 56 |
| M | 56 - 58 |
| L | 58 - 60 |
| XL | 60 - 61 |
Predator Helmet
| Size | Circumerefence (cm) |
| S-M | 54 - 58 |
| L-XL | 53-60 |
Crown Helmet
| Size | Circumerefence (cm) |
| S | 56 - 58 |
| L | 58 - 60 |
Shiznit Helmet
| Size | Circumerefence (cm) |
| S-M | 53 - 56 |
| L-XL | 57 - 60 |
