This is a Disney Little Mermaid ARIEL PRINCESS CHILDREN'S COSTUME DRES CHILDREN'S COSTUME. Made by Creative Designs. The tag says "4-6x". It is 28 inches long from top of shoulder to bottom of dress and about 13 inches wide from armpit to armpit.  It is in pretty good condition, some slight wear from use, but nothing major. See pictures. Combine auctions to save on shipping. AG