Leg Support There are several sized to choose from. It can be worn on the calf, knee, or thigh, and will help to relieve leg fatigue, dullness, numbness, or coldness. Medium 12"-16" Large 14"-18" X-Large 16"-22" How to choose the right size. The support should not be worn too tight. It should fit so that it does not fall off and so that it does not bother you when you wear it for a long time for while sleeping. by KYOWA TEXTILE USA INC. For additional information please E-Mail to info@kyowa-textile.com