Women's Halloween Mermaid Costume Dress with Sequin Skirt and Strapless Sweetheart Neckline
- In stock, ready to ship
Size Finder · Women
Your perfect fit in seconds
Answer a few quick questions and we'll recommend your size for Women's Halloween Mermaid Costume Dress with Sequin Skirt and Strapless Sweetheart Neckline.
Please enter your height and weight.
How would you describe your shape?
How do you like your clothes to fit?
Your recommended size
Still unsure? Our stylists reply within a few hours.
Get personal sizing help
Free shipping · Order today, arrives in 5–8 business days
- 90-day returnsPrintable return label by email
- Ships in 2–4 business daysTracked delivery in 3–4 days
- Real people, real answersEmail replies within a few hours
- Designed in the USAConsidered pieces, made to last
Strapless Mermaid Costume Dress – Transform Into an Enchanting Sea Creature
This mermaid costume delivers instant magical transformation with its stunning sequined skirt and fitted silhouette. Crafted from shimmering sequin fabric with a tiered organza tail and metallic purple bodice, it's the perfect choice for Halloween parties, themed events, and costume celebrations. The strapless sweetheart neckline and lace-up corset back create a flattering, show-stopping look that works beautifully indoors for parties, photoshoots, and masquerade events.
A seasonal best seller every October — this enchanting sequin mermaid dress captures the fantasy and elegance of underwater royalty.
Halloween stock sells out fast — order early. Dispatched within 24–48 hours.
Why You'll Love This Mermaid Costume
- Spooky Underwater Glamour: The shimmering scale effect, sequined skirt, and tiered organza tail create an instantly recognizable and mesmerizing mermaid transformation.
- Premium Materials & Durability: Sequin-covered bodice with mesh lining and sturdy lace-up corset back ensure this costume holds its shape and sparkle through multiple wears.
- Flattering Fitted Design: The strapless sweetheart neckline and fitted silhouette create a sleek, elegant look that flatters a range of body types.
- Floor-Length Impact: The full-length hem with blue ruffle waist trim and flowing tiered tail delivers a dramatic, head-turning entrance at any event.
- Reusable Year After Year: High-quality sequin and organza construction means this costume stays vibrant and wearable for many Halloweens to come.
Perfect For
Halloween Costume Parties: Stand out at any gathering with this show-stopping sequin mermaid dress that rivals any police officer costume or traditional party look.
Themed Events & Masquerades: The elegant strapless design and metallic purple bodice make it ideal for fantasy-themed celebrations, underwater parties, and formal costume events.
Photoshoots & Costume Portraits: The floor-length tiered tail and shimmering scale effect photograph beautifully, making it perfect for professional and social media costume shoots.
Carnival & Festival Celebrations: The vibrant sequined skirt and dramatic silhouette ensure you'll be noticed and admired in any festive crowd.
Specifications
- Material: Sequined bodice with metallic purple finish, tiered organza tail, mesh lining
- Design Features: Strapless sweetheart neckline, lace-up corset back with black ribbon lacing, blue ruffle waist trim, shimmering scale effect
- Fit: Fitted silhouette with floor-length hem
- Available Sizes: S, M, L, XL
- Color Options: Color A, Color B
What's in the Box
- 1x Mermaid Costume Dress
Slip on this mermaid costume and adjust the lace-up corset back for a custom fit. The lightweight mesh lining and sequined construction make it comfortable to wear throughout the evening. After your event, store flat or hang on a padded hanger in a cool, dry place to preserve the sequin detail and organza layers for next Halloween.
Halloween is almost here — order now so this stunning sequin mermaid dress arrives in time for your celebration. We stand behind every purchase with a money-back guarantee, so you can shop with confidence. Fast dispatch means your costume will be ready when you need it.
Size Guide
Find your fit.
Our pieces follow standard US sizing. If you're between sizes, choose the larger size for outerwear and knitwear and your usual size for dresses. The Size Finder on every product page gives you a personal recommendation in seconds.
Women's clothing
| Size | US | Bust (in) | Waist (in) | Hips (in) |
|---|---|---|---|---|
| XS | 0–2 | 31–32 | 24–25 | 34–35 |
| S | 4–6 | 33–34 | 26–27 | 36–37 |
| M | 8–10 | 35–36 | 28–29 | 38–39 |
| L | 12–14 | 37.5–39 | 30.5–32 | 40.5–42 |
| XL | 16 | 40.5–42 | 33.5–35 | 43.5–45 |
| XXL | 18 | 43.5–45 | 36.5–38 | 46.5–48 |
Men's clothing
| Size | Chest (in) | Waist (in) | Neck (in) |
|---|---|---|---|
| S | 35–37 | 29–31 | 14–14.5 |
| M | 38–40 | 32–34 | 15–15.5 |
| L | 41–43 | 35–37 | 16–16.5 |
| XL | 44–46 | 38–40 | 17–17.5 |
| XXL | 47–49 | 41–43 | 18–18.5 |
Shoes
| Foot length (in) | Women US | Men US | EU |
|---|---|---|---|
| 9.0 | 6 | – | 36–37 |
| 9.4 | 7 | – | 37–38 |
| 9.7 | 8 | 6.5 | 38–39 |
| 10.0 | 9 | 7.5 | 40 |
| 10.3 | 10 | 8.5 | 41 |
| 10.6 | 11 | 9.5 | 42–43 |
| 11.0 | – | 10.5 | 44 |
| 11.3 | – | 11.5 | 45 |
| 11.7 | – | 12.5 | 46 |
Still unsure? Email info@fifthavenuestyle.com for personal sizing help.
Every piece is made from carefully selected materials. Please follow the care label inside the garment. As a rule of thumb: wash knitwear cold and dry it flat, and have tailored outerwear professionally dry cleaned to keep its shape for years.
Free US shipping on every order. Orders are processed within 2–4 business days, then delivered within 3–4 business days. You'll receive a tracking number by email as soon as your order ships.
90-day returns. Return unworn items in their original condition within 90 days of delivery. Email us and we'll send you a printable return label; the label cost is deducted from your refund, except for damaged, faulty or incorrect items. Full return policy
