Farmalastic Sock (A-D) Normal Compression T-medium Black are socks for people with circulatory problems or who spend long periods of time on their feet. In addition, they allow compression through silver threads that help the good venous return and consequently provide greater rest and relaxation of the feet. Indicated to improve circulation, especially for those who suffer from circulatory problems and/or spend long periods of time on their feet. *This product only includes a single sock. The T-medium has an approximate calf circumference of 34-36 cm and ankle circumference of 22-23 cm. *For hygienic reasons, no returns or exchanges will be accepted on this product.