Size M youth Mermaid Costume Dress for Girls Mermaid Light Up Dress for Girls Mermaid Birthday Party Gifts Decorations Halloween Costumes (3-4T) is up for auction in Clothing, Shoes & Jewelry. The current bid is $2.00, 93% below the $29.99 MSRP, in As Is condition. This auction has ended — similar items appear in live auctions regularly.