1.In China,Only Foot Length can decide correct size,so please measure your foot length before ordering. 3.If your foot is wide or fat than usually, we suggest you buy one size bigger. Size 36 fit for Foot Length 23.5 centimetre. Size 38 fit for Foot Length 24.5 centimetre. Size 40 fit for Foot Length 25.5 centimetre. Size 42 fit for Foot Length 26.5 centimetre. Size 44 fit for Foot Length 28.0 centimetre. Size 46 fit for Foot Length 29.5 centimetre. New Adult Adult Water Shoes Barefoot Trail Shoes Barefoot Shoes Casual Ladies Hiking Aquatic Sneaker Shoe Man Leguano Saguar 36-47