Knee Supports Pad Gym Running Sports Gear Prevention Mitigation Knee Harm
M, Length: 26cm/10.24" , Upper Port: 16cm/6.3", Leg Circumference: 36cm-42cm/14.17"-16.54", Suggested Weight: 50-60kg(Approx.)
L, Length: 26cm/10.24" , Upper Port: 17cm/6.69" , Leg Circumference: 42cm-48cm/16.54"-18.9", Suggested Weight: 60-70kg(Approx.)
XL, Length: 26cm/10.24" , Upper Port: 18cm/7.09", Leg Circumference: 48cm-54cm/18.9"-21.26", Suggested Weight: 70-80kg(Approx.)
It is advised that you buy a large size at the upper limit.