I bought these for my son who is 9 years old and wears a size 5 shoe. I had looked in all major stores for good quality kids socks and they either ran too small or were made so poorly that they didn't last long. These socks are a hands down the best socks. I ended up buying the adult equivalent for myself and my husband. Good quality socks, very comfortable and soft, and didn't not pile in the wash or dryer.