Achilles Tendon Supporter Ankle Supporter YAMAYA (Yamaya Sangyo) Two pieces (for both feet) I purchased these and used them for one day, but the size was too small and didn't fit, so I am putting them up for sale. For reference... one piece cost 1980 yen + 360 yen for shipping. From the website... The silicone, based on taping theory, protects the Achilles tendon. WW silicone is attached on both sides of the Achilles tendon, applying pressure without strain, reducing the instantaneous stretching stress that causes pain and rupture. It firmly supports the Achilles tendon and reduces the burden during exercise. ●Applicable Sizes Ankle Circumference (Approximate) M 18cm - 22cm For women and those with slender calves L 22cm - 25cm For men LL 25cm - 28cm For those with thicker calves - Product Name: Achilles Tendon Supporter - Color: Navy - Size: For ankles