Mens black dress socks made of luxury fine silk by the Windsor Collection. 65% Spun Silk, 35% Nylon. Fits sock size 10-13 and shoe size 7-12. Formal Socks are generally thinner than other socks. When wearing out socks, atke into account the thinnest of then when pairing them with shoes. Tuxedo socks are also quite long. The reason behind that is for your shins of calves not to be able to show in the case of your throusers rolling up. It looks clean and professional.