The original Organic Threads socks made from my cotton since 1994. Spun and knit in North Carolina, USA. Three pairs to a pack. Size small fits ladies shoe size 5-7 (7.5 if one likes a snug fit) . Medium fits ladies shoe size 7 1/2- 10 . Size Large fits ladies shoe size 10 1/2+ and men’s shoe size 8-13 + . (On the sock labels are sock sizing, not shoe sizes, which many of us find unfamiliar) 85% Colorganic® Certified organic cotton (mine!), 10% stretch nylon (outer foot), 5% elastic, rubber core covered with nylon (inner top). Crew style only. The color intensifies with washing; the green being the most spectacular. The color is alive and develops with wear and with you. The last photo shows the raw colors brown and green below and the laundered once - color beginning to develop- on top. No returns. They have been selling so quickly that I have run out a few times- but luckily Organic Threads is able to send more my way. So, please check in a few days time if the size that you are looking for is temporarily sold out. Here is the link to the newsletter that I wrote about these socks : https://mailchi.mp/ef77908473c7/for-the-love-of-socks .