I've used these a few times, but I'm selling them because I don't think I'll use them anymore. They have some wear and tear, but they're still wearable. Please refrain from purchasing if you are concerned about stains. The size is listed as 23 cm, but "M" is written on the back. I usually wear shoes in the 23-23.5 cm range, so I think that's about the size you can expect.