This shoe is a standard size for leather shoes. It is recommended that, for example, for sports shoes, if you wear size 41, you buy size 40 for this shoe. If your feet are wide and chubby, then buy size 41. If you usually wear sizes 45-47, buy according to the shoe size you usually wear. If your feet are wide and chubby, buy one size larger. 3. After sales issues? Answer: Our shoes comply with the national three guarantee policy, with a seven day no reason return (without affecting secondary sales of the product) and a 15 day exchange service (without affecting secondary sales of the product). If there are any quality issues with the product, we will take full responsibility. Please feel free to purchase. Note: All data in our store are obtained from commercial or self measured sources; Different data may have certain biases due to different testing environments; Partial data, such as' XX% high ', refers to the comparison results between the product and specific products in our store, not numerical values.