This is a set of a card case and a key holder. ※The Help Mark is not included. Help Marks are distributed at stations, etc. Please inquire with your local municipality for details. Size: Approximately 11cm x 7cm You can insert cards, photos, etc. There is a hole, so you can attach a chain or something similar. Since it is made overseas, there may be some minor scratches. Please refrain from purchasing if you are concerned about this. Shipping will be via Rakuraku Mercari Bin or Yu-Yu Mercari Bin. You can put photos in it and decorate it for your hobbies, and I think you can use it in various ways. It seems like it can also be used as a Cheki holder by putting in a Cheki. When I put my Help Mark in it, it was the perfect size. I don't know if it will fit all Help Marks, but I think it can also be used as a case for Help Marks. Card case, card holder, Cheki case, Cheki holder, Help Mark case, trading card case, trading card case, plastic card case #PIYOcardcase