"Clove compression socks make your feet fresh and happy. Featuring 20-30 mmHG of compression and soft, cushioned bottoms, our socks keep your blood flowing in style." SIZING Small: Women's 5-8.5 Shoe | Men's 3.5-7 Shoe | Calf Circumference 11-14" Medium: Women's 8-11.5 Shoe | Men's 6.5-10 Shoe | Calf Circumference 13.5-16" Large: Women's 11-14.5 Shoe | Men's 9.5-13 Shoe | Calf Circumference 15.5-18.5"