SMALL: Women’s US Shoe Size 4-6, Men’s US Shoe Size 3y-5y
MEDIUM: Women's US Shoe Size 6-10, Men's US Shoe Size 6-8
LARGE: Women's US Shoe Size 10-13, Men's US Shoe Size 8-12

Cotton for comfort, Polyester, Rubber and Spandex Blend.

Extra cushion for increased support

Thick ribbing for secure, tight fit.