Feature 1Multiple sizes for sharing with friends and family or if you are searching for that perfect fit 2Our foot pocket can be used barefoot or with fin socks. 3Whether you're an avid swimmer or just doing it for fun, these fins provide the ultimate comfort 4We design our fins to provide you with the most efficiency accessibilityFeatures: Multiple sizes for sharing with friends and family or if you are searching for that perfect fit Our foot pocket can be used barefoot or with fin socks. Whether you're an avid swimmer or just doing it for fun, these fins provide the ultimate comfort We design our fins to provide you with the most efficiency accessibility Specification: Size EU US Length(cm/in) S 38-39 5~6 24.5/9.6 M 40-41 7~8 25.5/10.0 L 42-43 9~10 27.5/10.8 XL 44-45 10.5~11.5 28.5/11.2 Color: Blue Material: Silicone Size Options: S,M,L,XL Weight: Approx. 681g Package List: 1 Pair x Foot fins