I am always very skeptical about buying off the internet. After buying new tennis shoes and pulling up my right no show sock ever other step I took, I just knew I had to try these socks. I put them on thinking in a minute I will have to pull them up, BUT NO... amazing that the socks NEVER MOVED!! I bought a pack of nude and a pack of white. I wear a shoe size of 7, but I bought the small size and I'm so glad I did. They fit perfect!