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 4.5(25.5cm). 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 size error due to manual measurement. 6. If you have any questions, please contact our customer service first, we will help you resolve it.