Our newest mermaid tail this one is for little ones who want something simple. It does not come with a monofin, instead the bottom is open like a skirt, so the mermaid can hitch it up and walk to the beach. Fun and inexpensive, this tail is made from quality nylon-spandex fabric with a drawstring waist. Xsmall - waist 19-21" (48-53cm), hips 19-22" (48-58cm), waist to floor 26" (66cm), overall length 37" (94cm)small - waist 19-21" (48-53cm), hips 23-25" (58-64cm) waist to floor 32" (81cm), overall length 51" (129cm)note: for children with at least one year of swimming experience, and who are confident swimmers. Use only with adult supervision.