Body measurements. Fly determines groin guard size based on your waist circumference.
| Size | Waist (cm) |
|---|---|
| S | 69–74 |
| M | 76–84 |
| L | 86–94 |
| XL | 97–104 |
How to measure
Measure around your waist at the point where the groin guard band will sit.
Source: Fly size guide (https://flysportsuk.com/pages/size-guide), checked on 30-09-2026.
