A SunTails mermaid tail and swimsuit for girls ages 4 to 5. Our soft and comfortable mermaid tail and swimsuit are made from a premium swimsuit fabric with 4-way stretch (80% polyester, 20% spandex). The mermaid tail is open on the bottom and fits like a skirt. Swimsuit top has a wide, comfy band, and the hipster swim bottoms are comfortable and tugless wth elasticized waist and leg openings. Make your child's dream of being a mermaid come true. See size charts in product photos.