This Kids Mermaid Tail Swim Costume brings the ocean fairy tale to life with a rainbow gradient scale print that shifts from aqua to pink across the full-length tail. Set includes a halter-neck ruffled bikini top, matching briefs, a swimmable mermaid tail with side zip, and a black monofin that slots into the tail fluke for underwater propulsion.

What's in the Box

Halter bikini top (rainbow scale print, tiered ruffles, back neck tie)
Bikini briefs (elasticated waist, matching rainbow gradient)
Swimmable mermaid tail (side zip entry, scale-texture stretch fabric, sculptural fluke with iridescent detail)
Black monofin (rigid plastic with foot pockets, inserts into tail bottom)

Perfect for pool parties, beach holidays, mermaid-themed birthday celebrations, and fantasy dress-up play. The tail's stretch fabric allows natural leg movement while the monofin gives your child real swimming propulsion — just check your local pool allows monofins before diving in. Rainbow ombré runs from cool aqua and blue at the waist through purple and pink to the fluke, with side fins that hold their shape in water.

Parent FAQs

What size should I order?

The tail runs true to swimwear sizing and has good stretch through the hips and legs. If your child is between sizes, size up — the side zip gives you flex, and they'll get more wear as they grow. The monofin is designed to fit a range of foot sizes within each age bracket, but check the size chart for specifics.

Can they actually swim in this?

Yes — the monofin slots into the tail fluke and provides real propulsion. Your child kicks dolphin-style with both legs together. Supervise closely and only use in pools where they can stand or with confident swimmers. Some public pools don't allow monofins, so check ahead. The tail fabric is quick-dry stretch polyester.

Care: Rinse in fresh water after pool/ocean use. Hand wash cold, air dry flat. Don't wring or tumble dry — the tail's sculptural fins can lose shape. Store monofin separately.

Kids Mermaid Tail Swim Costume - Rainbow Bikini Set with Monofin