[Features] You can expect to promote venous return due to the extension of the toes. The heel part has a smooth weave on both sides of the heel and the outside. The opening of the shoe is stretchable, making it easy to put on. [Specifications] Ankle circumference (inches): S (6.7 - 8.3 inches (17 - 21 cm); Sole Size: 8.7 - 9.3 inches (22 - 23.5 cm); Material: Polyester, Cotton, Nylon, PU (Polyurethan); Ankle Wear Pressure: Over 0.6 inches (15 mm); Check Window Lid Color: Young grass colored medical device registration number: 34B3X100000000000808080808080808080000000000000000000011111111111111111111 mm x 3 mm g [Luggage figure] About the size]