Thank you for viewing. This is a shoe band that came with the shoes I purchased. My shoe size is 23-23.5cm, and it came with shoes of a similar size. It doesn't seem to stretch much. I haven't used it, so I don't know the details. I am selling it because I have no opportunity to use it. It is unused, but please understand that it has been stored at home for a period of time. *This item has been stored in a private home. There may be oversights. To prevent any problems, please read the description and view the images carefully, and if you have any concerns, please ask in advance. I also have precautions listed in my profile. Please take a look.