Dear Customer : Thanks a lot for choose our HAIZILI  brand ! Here are some tips about size before you buy it, Please choose the shoes size according to your foot length, NOT insole length. If your feet is wide or thick, please choose a larger shoes size. Before choose your size , you'd better measure your feet length. For example, if your foot length is 25cm, you'd better choose size 41. How to Measure Feet Length Please measure your feet length carefully, with the method of the picture below: Buyer Reading 1.Size Carefully read size chart before purchase!different products have different size chart. When buying shoes,choose the size according to your foot length ,it is equal to CHN size,just check the CHN size when you receive the shoes. If you have any questions,please contact Customer Service 2.Shipment Mostly,we will ship your orders in 1-5 working days. Logistics may delay due to holidays,babweather or other force majeure factors. If the delivery date is coming,but you haven't receive the item,contact us to extend the time of receipt. You can track your package via website: https://www.17track.net/zh-cn https://global.cainiao.com/ 3.Return & Refund Policy When you receive the goods,please check immediately whether it matches your order.If you want to exchange the items received,you must contact us in 7 days after the receipt of your order. Any questions please contact us at first,but NOT open a dispute or leave a negtive feedback!We will give you a satisfied respond within 48 hours.