Size chart = length of fit (cm): Size 35 = 22.5 cm Size 36 = 23 cm Size 37 = 23.5 cm Size 38 = 24.0 cm Size 39 = 24.5 cm Size 40 = 25 cm Size 41 = 25.5 cm Size 42 = 26 cm Size 43 = 26.5 cm Size 44 = 27 cm Size 45 = 27.5 cm Size 46 = 28 cm Size 47 = 28.5 cm Note: Please measure the length of your feet, for example, if your feet are 24.6-25 cm, choose a size 40. Measure: Place your heel against a vertical wall, use a marker to draw the farthest point of your toe from the wall (heel-to-toe), and measure the length of your foot with a ruler. Men's/women's river tracing shoes, quick-drying sea shoes, water shoes, beach shoes, swimming shoes, fitness shoes