Attention please 1. Choose the size according to your foot length don`t choose the size according to your country`s usual size 2. foot length insole length outsole length eg: USA 4.525.5cm. This 25.5cm is the length of the media insole only. 3. better choose 1-2 size larger if your foot is a little wide or chest is a little thick. 4. Light and camera equipment and monitors may cause color difference. if you are worried then please don`t pay. thanks. 5. Allow 0-0.5cm error in size due to manual measurement. 6. If you have any questions, please contact our customer service first, we will help you resoe it.