SIZE CHART: XS: SIZE 34-35, SOCK LENGTH 23.5CM; S:SIZE 36-37, SOCK LENGTH 24CM; M:SIZE 38-39, SOCK LENGTH 24.5CM; L:SIZE 40-41, SOCK LENGTH 25CM; XL:SIZE 41-42, SOCK LENGTH 25.5CM; Multi-sport Neoprene Diving Socks---The Neoprene Dive&Beach socks are designed for universal use for both ladies and men.Perfect for a Variety of Water Sports like swimming/diving/surfing/snorkeling/wakeboarding/kayaking/sailing/and so on. Dry Off QuicklyExcellent flexible & comfortable like a socks. Sticky Wide Type for easily buckle for waterproof diving,helping you adjust the water boots easily Perfect for snorkeling,diving,walking along the beach,protect your feet from cut,puncture,scratch,and cold water. Wearproof & AntislipThe sock sole and outer front are made of wearproof and heavy-duty fabric. Even when you walk on rough surfaces occasionally such as rocks and gravel, without damaging them as you would with standard diving neoprene socks. The heavy duty fabric can improve the sole anti-slip performance, you can play on the beach freely. Anti-Skid &Warm DesignThis neoprene socks lining is made of special warm materials.Can provide a great warming effect when you swim and dive.