This is a very old item. It's from the Showa era. My mother collected these, and I don't know the details of the material. It's unused, but it has been stored for a long time. The size is approximately 15.5cm x 20cm. I don't see any stains, but I can't say for sure. Even though it's unused, it's been stored for a long time. It's unopened, so I haven't been able to check the contents, and there may be dirt, stains, or storage odors that I've missed. Please refrain from purchasing if you are looking for a perfect or pristine item, or if you are sensitive to such issues. If you understand all of the above, please consider purchasing. Thank you very much. Please read my profile!