Standard Size: 130 X 180 X 65 [60 X 80 X 40] mm [L *W* H] [l*w*a] mm in which L = Length; W= Width; H= Height;  l = inner length; w = inner width and; 'a' = ankle support length in milimeters. 
Designed to provide maximum protection to heel and ankle area during prolonged surgeries
Elastomeric rebound at body extremity by extreme resting state  and adequate blood flow preventing foot ulceration
Each pack has 01 pair of Heel Cups (without strap).