Women's Halloween Mermaid Costume Dress with Sequin Skirt and Strapless Sweetheart Neckline
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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.
Not sure about your size? Use Find my size above — it takes a few seconds. Most styles fit true to U.S. sizing; oversized styles are marked in the name. For coats, size up if you like to layer.
Not sure which size to choose? Use the Fit Finder on any product page — it recommends your size in a few seconds. Measurements below are body measurements.
Women — clothing
| Size | US | Bust (in) | Waist (in) | Hips (in) | EU |
|---|---|---|---|---|---|
| XS | 0–2 | 31–32.5 | 24–25.5 | 34–35.5 | 32–34 |
| S | 4–6 | 33–34.5 | 26–27.5 | 36–37.5 | 36 |
| M | 8–10 | 35–36.5 | 28–29.5 | 38–39.5 | 38 |
| L | 12–14 | 37.5–39.5 | 30.5–32.5 | 40.5–42.5 | 40 |
| XL | 16 | 40.5–42.5 | 33.5–35.5 | 43.5–45.5 | 42 |
| XXL | 18 | 43.5–45.5 | 36.5–38.5 | 46.5–48.5 | 44 |
| 3XL | 20 | 46.5–48.5 | 39.5–41.5 | 49.5–51.5 | 46 |
Men — clothing
| Size | Chest (in) | Waist (in) | Neck (in) | EU |
|---|---|---|---|---|
| S | 35–37 | 29–31 | 14–14.5 | 46 |
| M | 38–40 | 32–34 | 15–15.5 | 48–50 |
| L | 41–43 | 35–37 | 16–16.5 | 52 |
| XL | 44–46 | 38–40 | 17–17.5 | 54 |
| XXL | 47–49 | 41–43 | 18–18.5 | 56 |
| 3XL | 50–52 | 44–46 | 19–19.5 | 58 |
Shoes
| Women US | EU | Foot (in) | Men US | EU | Foot (in) | |
|---|---|---|---|---|---|---|
| 5 | 35–36 | 8.6 | 7 | 40 | 9.6 | |
| 6 | 36–37 | 8.9 | 8 | 41 | 9.9 | |
| 7 | 37–38 | 9.3 | 9 | 42 | 10.3 | |
| 8 | 38–39 | 9.6 | 10 | 43 | 10.6 | |
| 9 | 39–40 | 9.9 | 11 | 44 | 10.9 | |
| 10 | 40–41 | 10.3 | 12 | 45 | 11.3 | |
| 11 | 41–42 | 10.6 | 13 | 46 | 11.6 |
Between sizes? For coats and jackets we recommend sizing up if you like to layer a sweater underneath. For personal fit advice, email contact@delmoe.com.
Free tracked shipping on every U.S. order. Processing 2–3 business days + delivery 4–5 business days (about 6–8 business days in total). Ships from our North American warehouse.
90 days to decide. Return unworn items with tags within 90 days of delivery for a full refund. Return shipping is paid by the customer — if an item is defective or we sent the wrong one, we email you a free prepaid label. Start a return at contact@delmoe.com.
Pay with Visa, Mastercard, American Express, Apple Pay or Google Pay. Our checkout is SSL-encrypted and hosted by Shopify (PCI DSS Level 1) — card details are never stored by DELMOE.
Please see the description for material details. To keep knits and wool-blends beautiful: hand wash cold or use a gentle wool cycle, lay flat to dry, and fold rather than hang. Coats: spot clean or dry clean.
The DELMOE promise
- Designed in Montana. Every piece is chosen for real cold-weather wear.
- Wear it for 90 days. Not right? Return it within 90 days of delivery.
- Defective or wrong item? We send you a free prepaid return label.
- Pay securely with Visa, Mastercard, Amex, Apple Pay or Google Pay — card details are never stored by us.
