SIZING CHART ? WOMENS Small 6 – 8.5, Medium 9 – 11, Large 11.5 – 15; MENS Small 5 – 7.5, Medium 8 – 10, Large 10.5 – 12. If you are in between sizes, order the smaller size. TX Compression Socks are tailored for individuals suffering from venous insufficiency, and have a moderate gradient that gets less tight as the sock goes up the leg for maximum relief of fatigue and improved circulation. This supports muscles and tendons in achieving a faster recovery. Designed with a moisture wicking material which transports perspiration away from the skin, keeping them dry, odor free, and comfortable year round. The cushioned bottom provides further support ? perfect for those who are on their feet all day. With compression highest at the foot, our socks have a unique graduated level of tightness that gets less firm as the sock travels up the leg. This helps maintain a more naturally improved blood flow than socks which are simply tight. A non-binding top cuff prevents sagging without digging into the skin. TX Compression Socks deliver a firm compression of 20 to 30 mmHg. This compression level has been found useful for treating chronic venous insufficiency and moderate leg swelling or edema, ideal for those who are on their feet all day, pregnant, diabetic or recovering from injury.