I bought a new pair of hiking boots and they were a half size bigger which is what you need. I usually walk barefoot in sneakers. Because the new shoes were slightly larger, the heels of the shoes would rub against my heels and leave blisters. I needed socks to put on my new shoes. All my ankle socks were made in size 7-13. This is utter nonsense. I wear size 12 shoes and the ankle socks I bought in size 7-13 were too small. I had to stretch them as much as possible to put them on and then it took about 2 minutes of walking for the socks to slip off the heel. I bought these socks and what is the difference. The socks are thick, comfortable and fit! I will buy them again and recommend them to anyone looking for a good pair of socks!