Eleoption Fins Full Foot Lightweight for Diving, Snorkeling, Swimming Snorkeling Scuba Diving Swim FINS for Women Men Adult Kids Boys Girls The Light fins are specifically designed for pool use and for swim training, but can also be used adequately for recreational swimming and snorkeling. Soft silicone short blade training fins help you develop a stronger, faster flutter kick Walk around land comfortably. No more awkward waddling in and out of the water. You will have more foot protection as each fin has a strong rubber sole. Appropriate for fitness and competitive swimmers to build cardiovascular conditioning and endurance SIZE: F800(XXS)27-29 --US 0.5-1 -- product length:25CM; F800(XS)30-32 --US 1-2 -- product length:26CM; F800(S)33-35 ,US 2-4 , product lenth:29CM ; F800(M)36-38,US 4-6,product lenth:30CM ; F800(L)39-4, US 6-8, product lenth:32.5CM F800(XL)42-44M,US 8-10, product lenth: 34CM ; F800(XXL)44-46, US 10-12, product lenth: 35.5CM.