The package include 4 pair of We Up Grip Socks. These exclusive pair of We Up Sports Grip Sock are built for high performance soccer athletes. The internal and external features of the sock completely grip your feet so you eliminate all possibilities of slipping on a pitch. The improved durability and material within your footwear will allow you to change direction, accelerate and decelerate, and overall perform at your maximum ability. If you wear a size 8.5 or above, it's recommended to choose the medium size. If you wear a size 8.5 or smaller, the small size is the suitable option for you.