I bought this a few years ago and wore it twice. (It didn't suit my son...) It's gray, so it's a design that can be worn by both boys and girls. I've been storing it hanging on a hanger. According to the petit main website, size M corresponds to a size 100-110. There are no stains, but please understand that this is a used item that a child has worn before purchasing. I will fold it up small and ship it.