I received this from a relative, but since I won't be using it, I'm offering it to someone who will. I'm not sure how to wear it, but I think it's like a pajama or loungewear to be worn over underwear or a diaper in the summer? The size is as shown in the fourth image. I don't see any stains, but it has been worn by a child. I'm offering it to someone who doesn't mind the details and can understand and accept this. familiar Babygro The shipping method will be the cheapest option, with simple packaging.