It may look like there are some marks from the light, but there are no noticeable stains; it's clean. I've only worn these indoors at home, and I haven't worn them many times. I hand-washed them carefully before listing them. There's no tag, so I don't know the size, but I measured them with a tape measure, and I think they're 19.5cm. Soft fleece unicorn design slippers, providing comfort indoors. - Design: Unicorn face design - Color: White and lavender - Material: Soft fleece - Use: Indoor slippers Thank you for looking.