No Show SocksPerfectday Quality Cotton Socks Small Black The sizing is by the U.S. Mens shoe size: Small 6-12, and Large 12-15. Please do not follow the Amazon sizing guide. Still not sure about your size? Let us know and well help you out. Theyre 85% cotton, so your feet will stay cool and comfortable. Theyre long lasting. Machine washable; air-dry only. Premium Quality. Great Fit. And 100% no-show! Large silicon grip on heel prevents slipping. They stay on your feet guaranteed! If youre not happy with the fit we will send you another size, at no extra cost. 1 Pack These socks are sold on Amazon.com exclusively by Angella's Lamp and shipped via Amazon. The cheaper alternatives out there, with long shipping times, are selling fakes. Their fit and quality cannot be guaranteed. If you did buy from one of these sellers and are unhappy with your purchase now is the time to try our original hosiery range from Angella's Lamp