Thank you for viewing! This is a set of 10 sneaker socks. They are designed with non-slip grips on the heel to prevent them from slipping off. The set includes 5 pairs of black socks and 5 pairs of white socks. The thin fabric is perfect for the coming season, and although it's thin, it's durable, making it highly recommended! Size: 36-39 (approximately 22.5-24.5 cm)