Girls' Halloween Mermaid Costume with Accessories for Dress-Up Party
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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 mermaid princess-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 mermaid princess 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 mermaid princess 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 mermaid princess mermaid dress-up experience.
but Weld New York exceeded my expectations. The quality felt great and my order arrived sooner than expected.
The dress looked like the photos and fit really well. I’d order again.
The fabric felt better than I expected and the style was flattering.
The bag looked polished in person and the finish was clean.
The shoes were comfortable right away and matched the outfit I bought them for.
I had a sizing question and got a clear response quickly.
The material felt substantial and the fit was true to size for me.
The bag feels sturdy and works well for everyday use.
Checkout was easy, shipping updates were clear, and the item matched the description.
Exactly what I wanted for a clean, dressed-up look.
The top felt well made and fit close to what I expected from the size chart.
Everything was packaged nicely and got here on time.
The site was easy to use and the order process was straightforward.
After a couple washes the item still looks good and keeps its shape.
I’ve placed more than one order and have had a good experience each time.
I ordered a set for an event and was pleasantly surprised by the quality.
The sizing was pretty accurate and the cut looked flattering on.
The color and finish looked very close to the product photos.
Easy to style and comfortable enough to wear all day.
My order shipped fast and everything arrived in good condition.
The item felt well made and looked good right out of the package.
It arrived neatly packed and felt like a thoughtful purchase.
This was my first time buying from Weld New York and it went smoothly.
The piece was easy to dress up or down and looked like something I’ll wear often.
The whole experience was easy and the product met my expectations.