Ariel Costume - (Adult)Aquamarine, lilac and touches of emerald green transport you deep into Ariel's world. Grown ups get the chance to dream as Disney's Little Mermaid, thanks to this romantic outfit that tapers down to mesh tail fins that will keep other sea life guessing where your human legs have gone! Features: Dress with sequin bodice. Size Guide: (U. K.) Large : (16 18 dress size).