Measure around your waist at navel height, standing relaxed. Do not use your trouser size — belts sit higher and read 5–10cm larger.
| Size | Waist (cm) | Waist (in) |
|---|---|---|
| S | 66–81 | 26–32 |
| M | 81–96 | 32–38 |
| L | 96–112 | 38–44 |
| XL | 112–127 | 44–50 |
| XXL | 127–142 | 50–56 |
Between two sizes? Take the larger one — the lever gives you three notches of adjustment either way.