Ninja Unisex Socks, one size Made in the U.S.A. 75% cotton, 20% Nylon and 2% spandex with cushioned heels and toes. Machine wash cold, line dry. Unisex. One Size Fits Most Helpful sizing info: Unisex Design Fits Most - Women's Shoe Size 7 - Men's 13.5. Socks Reach to the Knee on Persons 5'2" - 6'2" (so they'll be over-the-knee socks on petite folks and mid-calf height on big birds). Made in the U.S.A. of 75% Cotton, 20% Polyester, 5% Spandex to Comfortably Fit Most Leg Shapes.