Thermabuild | Girls' Halloween Mermaid Costume Outfit with Accessories

Transform into an Enchanted Mermaid with This Complete Costume Outfit

This girls mermaid costume delivers instant magical transformation with a stunning purple and teal dress, shimmering metallic scales, and all the accessories needed for a complete Ariel-inspired look. Crafted from quality materials with eye-catching sequin details, this mermaid theme dress is perfect for Halloween parties, dress-up play, birthday celebrations, and themed events. The included matching accessories—headband, wand, purse, and jewelry set—make it an all-in-one costume solution that requires no hunting for extras.

A seasonal best seller every Halloween — this complete mermaid outfit has parents and kids coming back year after year.

Halloween stock sells out fast — order early. Dispatched within 24–48 hours.

Why You'll Love This Mermaid Costume

Magical mermaid transformation: Purple and teal colouring with metallic scale patterns and gold sequin trim create an authentic, enchanting look that brings fantasy to life.
Complete dress-up package: Includes matching floral headband, toy wand, sequined purse, and jewelry set — everything needed for an instant, polished Ariel mermaid dress-up experience.
Comfortable and easy to wear: Sheer cap sleeves and a peplum waist ruffle ensure a flattering, comfortable fit, while the flared mermaid tail hem allows easy movement for play and dancing.
Versatile for any occasion: Ideal for Halloween trick-or-treating, birthday parties, carnival events, photoshoots, and imaginative role-play at home.
Reusable year after year: High-quality construction with sequin details and durable fabric means this mermaid costume stays vibrant and wearable for many celebrations to come.

Perfect For

Halloween trick-or-treating: The complete accessories package and eye-catching sequin details make this Ariel costume kids' favourite for neighbourhood adventures.

Birthday and themed parties: Transform any celebration into an underwater fantasy with this mermaid tail dress that stands out among other costumes.

Dress-up play and role-play: The included wand, purse, and jewelry set encourage imaginative play and storytelling beyond just one special event.

Photo shoots and special events: The metallic scale pattern and gold swirl bodice create stunning visual details perfect for capturing magical memories.

Specifications

Material: Quality fabric with metallic scale pattern, gold sequin trim, and gold swirl bodice detail
Design features: Purple and teal colouring, sheer cap sleeves, peplum waist ruffle, flared mermaid tail hem
Available sizes: S, M, L, XL
Included accessories: Matching floral headband, toy wand, sequined purse, toy jewelry set

What's in the Box

1x Girls mermaid costume dress
1x Matching floral headband
1x Toy wand
1x Sequined purse
1x Toy jewelry set

Simply slip on the mermaid costume dress, secure the matching headband, and add the accessories for an instant complete look. The durable sequin details and quality fabric are designed to withstand active play and multiple wears. After the celebration, store flat or gently folded in a cool, dry place to keep the costume fresh and ready for next year's magical adventures.

Halloween is almost here — order now so this enchanting mermaid costume arrives in time for your celebration. With fast dispatch and our money-back guarantee, you can shop with confidence knowing your child will have a complete, show-stopping Ariel mermaid dress-up experience.