Feature - 2-way stretch high quality yarn - Open heal for better fit - Provides excellent compression to reduce swelling - Promotes healing by increasing circulation Applications - Arthritis - Swelling - Mild ankle sprains & strains Warmth - Weakness SIZE : Measure circumference just above ankle bone S    8 - 83/4         (inch)     20.3 - 22.2 (cm) M   81/2 - 91/4    (inch)      21.6 - 23.5  (cm) L    9 - 93/4         (inch)      22.9 - 24.8  (cm) XL  91/2 - 101/4   (inch)     24.1 - 26.0 (cm) What's in the Box : 1piece x Basic Ankle Support Elastic