These are socks knit in 100% alpaca. I knit these in solid colors and with contrasting heel and toe. They do come in sizes, and if I have the color you want, special orders are welcome. These are very cozy and warm, perfect to wear with boots. Sizes are: Small 10″ from top to heel, and 6.5″ sole. Medium: 12″ from top to heel, and 9″ sole. Large: 15″ top to heel, and 12 sole. These are unisex, so the sizes are for both. If you want special sizes, just let me know.