Sailors Beware! Greek Myths Come Alive With This Siren Costume! You Will Be Comfortable But Sexy In This Mermaid Black Maxi Tank Dress With Screen-Printed Fishtail Skeleton. The Enchanting Ensemble Comes With Finned Arm Warmers And A Matching Finned Head Piece. Add Your Own Mermaid Wig And Shoes. Small Medium Fits Women'S Sizes 4-8.