Measure the circumference of the centre your thigh when stood with a straight leg.
| Size | Range (cm) | Range (Inches) |
| Small | 37cm – 43cm | 14.6" - 16.9" |
| Medium | 43cm - 50cm | 16.9" - 19.7" |
| Large | 50cm - 56cm | 19.7" - 22" |
| XL | 56cm - 62cm | 22" - 24.4" |
| XXL | 62cm - 68cm | 24.4" - 26.8" |
If you are between sizes it is advisable to go for the larger size.