Thigh High Compression Socks For Women and Men Circulation: Enhance blood cycling Reduce foot swelling Relieves varicose veins Relieve muscle fatigue and soreness Post-surgical recovery, and athletic recovery Prevent edema fluid retention Prevent blood clots The last letter in the product label ‘Thigh High Socks-Black- L’ indicates the size of the socks. This style of socks is available in 7 sizes: S, M, L, XL, 2XL, 3XL, and 4XL, corresponding to the size chart in the description. Package include:1 pairs of thigh high ted hose compression stockings