How do I select my size? 1.Measuring your foot length. Make sure you're standing on a flat surface. Trace the outline of your feet on a piece of paper. Keep your writing utensil as perpendicular to the paper as possible so you get the most exact measurements. Once your feet are traced, use a ruler to measure from your heel to the tip of your longest toe. 2.Then use this shoe size chart to convert the length of your feet to a U.S. shoe size. Fox example: If you choose US 8.5. We will send size EUR 40. It comes with 25.0 cm insole length If you feet are fat, you may choose the bigger one Women's International Shoes Size Chart Foot length range Shoes inside Size US Size UK Size EUR 20.0~20.8cm(8.50~8.66inch) = 20.8cm(=8.18inch) = 4.0 = 2 = 34 20.8~21.5cm(8.70~8.86inch) = 21.5cm(=8.39inch) = 4.5 = 2.5 = 35 21.6~22.5cm(8.90~9.06inch) = 22.5cm(=8.75inch) = 5.5 = 3.5 = 36 22.6~23.5cm(9.09~9.25inch) = 23.5cm(=9.25inch) = 6 = 4 = 37 23.6~24.0cm(9.29~9.45inch) = 24.0cm(=9.45inch) = 7 = 5 = 38 24.1~24.5cm(9.49~9.65inch) = 24.5cm(=9.65inch) = 8 = 6 = 39 24.6~25.0cm(9.69~9.84inch) = 25.0cm(=9.84inch) = 8.5 = 6.5 = 40 25.1~25.5cm(9.88~10.04inch) = 25.5cm(=10.04inch) = 9.5 = 7.5 = 41 25.6~26.0cm(10.08~10.24inch) = 26.0cm(=10.24inch) = 10 = 8 = 42 26.1~26.5cm(10.28~10.43inch) = 26.5cm(=10.43inch) = 10.5 = 8.5 = 43 26.6~27.0cm(10.47~10.63inch) = 27.0cm(=10.63inch) = 11 = 9 = 44 27.1~27.5cm(10.67~10.83inch) = 27.5cm(=10.83inch) = 12 = 10 = 45 Allow 2~3mm differs Upper material: PU Sole material: rubber Inside material: Cortex Applicable Gender: Female Popular elements: shallow mouth Toe shape: round head Upper height: low to help Heel shape: thick with Sole Technology: viscose shoes Heel height: low with (1-3CM) Function: Increased Suitable for the season: spring, autumn Color: yellow, green, black Size: 35,36,37,38,39