Womens Mermaid Costume Dress Sequins Strapless Sweetheart Neckline Lace Up Corset Back Halloween
Transform into a Shimmering Mermaid Costume This Halloween
This mermaid costume from Millra delivers instant fantasy elegance — the strapless sequined dress transforms you into an enchanting sea creature for Halloween parties, masquerades, and themed events. Made with a fitted bodice with metallic purple tones and a multi-tiered sequined skirt in shimmering green and blue, it's designed for indoor costume wear and special occasions where you want to make a splash. The floor-length organza tail and intricate lace-up corset back create an unforgettable silhouette that works perfectly alongside other costume ideas like a ladies pirate costume or police officer costume womens for group themes.

A Millra favorite every Halloween — this womens mermaid dress is a go-to choice for costume parties and fantasy celebrations.
This one sells out quickly each season — order early. Dispatched within 24–48 hours.
Why You'll Love This Mermaid Costume
- Enchanting Mermaid Silhouette: The strapless sweetheart neckline, metallic purple bodice, and flowing organza tail create an instantly recognizable fantasy look that stands out at any Halloween event.
- Dazzling Sequin Details: Green and blue sequins across the fitted skirt catch the light beautifully, making this womens mermaid dress shimmer and shine throughout the night.
- Comfortable Fit & Support: The lace-up corset back with black ribbon lacing offers adjustable support, while the strapless design keeps you secure during dancing and movement.
- Indoor Wear Ready: Perfect for costume parties, masquerades, photoshoots, and themed celebrations—designed for comfortable all-night wear indoors.
- Reusable Year After Year: High-quality sequin mermaid dress construction means you can wear this costume again for future Halloween celebrations and fantasy events.
Perfect For
Halloween Costume Parties: The sequin mermaid dress delivers instant fantasy appeal—ideal for group themes or standalone costume celebrations.
Masquerades & Fantasy Events: The elegant strapless design and flowing tail work beautifully for masquerade balls and themed costume gatherings.
Photoshoots & Carnival Fun: The shimmering sequins and dramatic silhouette photograph beautifully, making it perfect for costume photoshoots and carnival celebrations.
Themed Party Coordination: Pairs well with group costume ideas—wear alongside a ladies pirate costume or other fantasy themes for coordinated fun.

Specifications
- Material: Metallic purple bodice with sequined skirt, sheer organza tail, and mesh back panel
- Design Features: Strapless sweetheart neckline, lace-up corset back with black ribbon lacing, ruffled waist trim, multi-tiered ruffled hem, wavy textured pattern
- Silhouette: Mermaid-style, floor-length hem
- Size Range: S, M, L, XL
- Color Options: Color A, Color B
What's in the Box
1x Mermaid Costume Dress
Setup & Care
Simply slip on the mermaid costume dress and adjust the lace-up corset back to your desired fit for a secure, comfortable wear all night. The strapless sweetheart neckline stays in place during movement and dancing. After your Halloween celebration, hand wash gently and lay flat to dry, then store in a cool, dry place so your sequin mermaid dress remains pristine and ready for next year's costume event.
Halloween is almost here — order now from Millra so this womens mermaid dress arrives in time for your celebration. Fast dispatch and our money-back guarantee mean you can shop with confidence.
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.