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