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For a perfect fit, compare your measurements to the size chart provided.
If your measurements fall between sizes or if you're uncertain about which size to select, we highly recommend opting for the larger size. Our experience with the 187 killer knee pads has shown that customers tend to be more satisfied with the larger size choice.
Metric (cm)
| Size | Pro Knee/Pro Derby | Fly Knee Pads | Knee Gaskets |
| XS | 25.5 - 30.5 cm | 25.5 - 30.5 cm | - |
| S | 30.5 - 35.5 cm | 30.5 - 35.5 cm | 30.5 - 35.5 cm |
| M | 35.5 - 40.5 cm | 35.5 - 40.5 cm | 35.5 - 40.5 cm |
| L | 38 - 43 cm | 38 - 43 cm | 38 - 43 cm |
| XL | 43 - 51 cm | 43 - 51 cm | 43 - 51 cm |
| 2XL-3XL | 53.5 - 61 cm | - | - |
Imperial (in)
| Size | Pro Knee/Pro Derby | Fly Knee Pads | Knee Gaskets |
| XS | 10 - 12 in | 10 - 12 in | - |
| S | 12 - 14 in | 12 - 14 in | 12 - 14 in |
| M | 14 - 16 in | 14 - 16 in | 14 - 16 in |
| L | 15 - 17 in | 15 - 17 in | 15 - 17 in |
| XL | 17 - 20 in | 17 - 20 in | 17 - 20 in |
| 2XL-3XL | 21 - 24 in | - | - |
How to Measure
Follow the instructions below and compare your measurements with the size chart
Circumference of the Knee
Measure the knee circumference in the middle of the knee (around the knee cap), while your leg is stretched.
Tip! Use a soft measuring tape, to ensure that the product fits properly. Alternatively, use a piece of string and then measure it against a ruler
