Small
Knee – 30–36 cm
Elbow – 20–26 cm
Wrist – 14–18 cm

Medium
Knee – 36–40 cm
Elbow – 26–30 cm
Wrist – 18–22 cm

Large
Knee – 40–44 cm
Elbow – 30–34 cm
Wrist – 22–26 cm

Measure around the joint area (knee, elbow, wrist) for best fit. If you're between sizes, choose the larger size for comfort.