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GrappleSock: The unique five toe, elastic design that contours to the foot enabling the user to cover and protect the feet yet still preserve the foot's sensitivity while practicing martial arts.
Available in sizes small, medium and large.
Due to the ultra thin fabric, the product is not designed to stretch beyond a size 11.5
. See size chart below:
Small: youth size 4-8; women size 5-9
Medium: women size 9-11; men size 8.5-10
Large: men size 10.5-11.5
Maybe he can special order a pair.