New in package, unworn. Doctor's Choice Diabetic and Circulatory black Crew Socks, 2 pair, treated with antimicrobial agent. Non irritating flat toe seam, dryer feet, promotes circulation with non-binding top. Sock Size 10 - 13, Large, Shoe size is 9 - 12 1/2. 95% polyester, 4% rubber, 2% spandex. They are soft and have a lot of give to them, not tight compression socks that you can hardly pull up. The front of the box says shoe size 6 - 12 1/2, the back 9 - 12 1/2. I would presume the 9 - 12 1/2 is the correct sizing for large.