HQz Fire Socks Athletic Fit with cushion in the sole area, Each sock is marked with L and R for Left and Right foot. Features sweat wicking cotton for maximum coolness. HQz Patch in the upper side of each sock. Small - (Youth Shoe Size 3Y-5Y) (Women's Shoe Size 4-6) Medium - (Men's Shoe Size 6-9) (Women's Shoe Size 7-11) Large - (Men's Shoe Size 9-13)