Fin Fun Mermaid Tail Outfit for 18 Inch Doll Like American Girl - Sparkle Purple Sky - Outfit Only, Doll Not Included &hellip; Delight your little mermaid with a mermaid doll tail for her American Doll and other similar 18 Inch Dolls. Choose the color you love, or the one that matches your child's Fin Fun Mermaid tail. Made with the same material and designed to match child and adult sized Fin Fun Mermaid tails and swimwear.