How to choose the correct size: Step 1. Please measure your foot length carefully,when you choose the size. Step 2. Please choose the correct size according to your foot length For example, if your foot length is 26 cm, you should choose the size 42. Step 3. If you are not sure of the correct size, you can click Contact Us NOTE: Don`t choose the size based on the Insole length and Outsole length Feet length=Insole length-0-1.5 cm Kind tips: If you find any quality problems after receiving the goods, please do not rush to leave a negative review or directly apply for a return or refund. In order to soe your problem more efficiently, we recommend that you contact us through online customer service first and provide a detailed description or photos of the relevant problem. Our customer service team will handle it for you as quickly as possible to ensure that we provide you with a satisfactory solution, whether it is replacement of goods, repair or other reasonable methods. We are always committed to providing quality service to every customer, and your satisfaction is our motivation. Thank you for your trust and support, and I hope you can give us a chance to soe your problem