These Socks are designed with Compression Technology and these socks offer optimal support and comfort. They're designed to help your legs and feet while sporting a very cool look and design. Constructed with 80% Polyester and 20% Spandex, these Compression Socks by FITDIO will accommodate Men shoe sizes 9-11 and Women 11-13. The ankle circumference is 12” and the recommended maximum calf circumference is between 17”-18”. Laid flat, these Compression Socks are 21”-22” in length and the pair weighs an estimated 2.50 ounces. We strongly recommend everyone to measure their leg before making the purchase to make sure, our Compression Socks are the right fit for you. Feel free to email us via Amazon if you have any questions. It would be our pleasure to assist you.