Girls Mermaid Costume Outfit with Accessories Ariel Dress Up Halloween Party
Transform into an Enchanted Mermaid with This Complete Costume Outfit
This girls mermaid costume from Millra 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. Made from quality materials with eye-catching sequin details, this mermaid theme dress is great 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 Millra favorite every Halloween — this complete mermaid outfit has parents and kids coming back year after year.
This one sells out quickly each season — 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 from Millra 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.
Shipping & delivery
Free shipping on every order, with no minimum spend. We currently ship within the United States only.
Orders are processed in 1–3 business days (Mon–Fri). Orders placed after 6:00 PM are processed the next business day, and we don't process on weekends or public holidays. Shipping then takes 5–10 business days, so expect 6–13 business days in total.
We ship with USPS, FedEx, UPS, DHL and GOFO. You'll receive a tracking number by email as soon as your order ships.
Returns & refunds
You can request a return within 30 days of delivery. Items must be unused, in original condition and in their original packaging.
Email help@millra.com with your order number and reason for return and our team will send you instructions. We charge no restocking fee. Return shipping is paid by the customer, unless the item is defective or the wrong product was sent.
Once we receive and inspect your return we'll notify you, and approved refunds are issued to your original payment method within 5–7 business days.
What our customers say
★★★★★
Went straight on the tree. The gold edging catches the lights beautifully and it sits upright without drooping like our old one.
★★★★★
First thing every guest picks up. The gold dish is heavier than I expected and it holds my keys and rings perfectly.
★★★★★
The pair looks like something from a gallery shop. Matte finish, no fingerprints, and the stems sit exactly how I wanted.
★★★★★
My daughter played with this for an hour straight, which never happens. Solid wood, smooth edges, no splinters anywhere.
★★★★★
Two sizes was the right call — the small one lives by the stove now. Wipes clean in seconds and no staining so far.
★★★★★
Silent movement, which was the whole reason I bought it. Looks far more expensive than it was.
★★★★★
The glow is soft enough to leave on overnight and the numbers read clearly from across the room.
★★★★★
Mounted under the cabinet in five minutes and it hasn't budged. Tears one-handed exactly like it should.
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Your Millra guarantee
30-day money-back guarantee
If your order isn't right for you, request a return within 30 days of delivery. Items need to be unused and in their original packaging. We charge no restocking fee, and once we've received and inspected the return your refund goes back to your original payment method within 5–7 business days.
Why shop with Millra?
- Free shipping on every order, no minimum spend
- Tracking number emailed as soon as you ship
- 30-day returns with a 0% restocking fee
- Secure payments
- Real people on email, Mon–Fri 8am–6pm
Frequently asked questions
How much does delivery cost?
Shipping is free on every order, with no minimum spend. We currently ship within the United States only.
How long will my order take to arrive?
Orders are processed in 1–3 business days, then shipping takes 5–10 business days — 6–13 business days in total. Orders placed after 6:00 PM are processed the next business day, and we don't process orders on weekends or public holidays.
Which carriers do you ship with?
We use USPS, FedEx, UPS, DHL and GOFO, depending on your location and the size of the order.
How do I track my order?
You'll get a tracking number by email as soon as your order ships, with a link to follow it. If your package is lost or stolen, contact us and we'll work with the carrier to resolve it.
Can I return it if I don't like it?
Yes. Request a return within 30 days of delivery — items must be unused, in original condition and in their original packaging. Email help@millra.com with your order number and reason, and we'll send instructions. There's no restocking fee, and approved refunds reach your original payment method within 5–7 business days of us inspecting the return.
What if my order arrives damaged or wrong?
Contact us within 48 hours of delivery with photos and we'll send a free replacement or a full refund, whichever you prefer.
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Free shipping
Free shipping on every order within the United States.
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30-day returns
Not completely satisfied? Request a return within 30 days of delivery.
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Secure payments
We use trusted payment providers, so your card and personal details are never stored by us.