Slow and steady wins the race. At least for turtles. Sock size 10-13 fits U.S. men’s shoe size 7-12.5 Outlands USA Recycled Cotton We've created a product of exceptional quality - extremely durable and capable of handling the most outdoorsy of outdoor adventures - that doesn't break the bank. Socks are made in Hickory, North Carolina. Excess apparel scraps are collected by our partner Recover, and transformed into new premium recycled fibers. Fibers are separated by color and sent to our factory in North Carolina, where they are spun and twisted with nylon and spandex, to produce the finished knitted product. Certified as meeting the highest standards of recycling by the Global Recycling Standard and Oeko-Tex.