This is an adult Ariel costume. It's a set including a dress, a bustier, a ribbon, and a wig. The costume is free size. The dress fabric is thick and sturdy. There's a zipper under the arm, so even I, who usually wears a size L, could wear it, but it was a little difficult to take off, so it might be perfect for those who usually wear sizes S to M. The wig's bangs are already styled.