Finding a compression sock that fits plus-size calves is challenging for many people. Our latest version of the Marathon Wide-Calf knee-high compression socks accommodates a broader range of larger calf sizes while delivering the appropriate level of 20-30mmHg compression. The new Black on Black Marathon Wide-Calf socks fit the following calf circumferences measured in inches: 2XL = 20 to 22 inches 3XL = 23 to 24 inches 4XL = 25 to 26 inches Refer to the size chart for more details  Our knee-high Marathon socks provide graduated compression, which increases blood flow and allows you to perform at your peak, recover faster, and feel better sooner. Our advanced design supports critical muscles and tendons, and our proprietary blend of materials wicks moisture for a comfortable fit that goes the distance.