These are MUJI's stretchy pants. The size is S. My child has outgrown them, so I'd like to pass them on to someone who understands used clothing. They were worn regularly, so they show signs of use and are not in perfect condition. However, I don't think there are any noticeable stains or damage. They are very comfortable to wear, and my child liked them. They will be sent via Mercari delivery with simple packaging.