Choose the size according to your foot length (don't choose the size according to the usual size in your country!!!) please choose Size 39 , if your foot length is24.5cm. please choose Size 40, if your foot length is 25cm. please choose Size 41, if your foot length is 25.5cm. please choose Size 42, if your foot length is 26cm. please choose Size 43, if your foot length is 26.5cm. please choose Size 44 if your foot length is 27cm. 2. Due to manual measurement, please allow 0-0.5cm error in size. 3. If you have any questions, please contact our customer service first, we will help you solve it. Please read our size chart carefully! It can help you choose the right size based on the length of your foot. Please note that if your feet are too long or too wide, please choose a size that is one size larger than usual.