Girls' Halloween Mermaid Costume Dress with Sequin Accessories for Dress-Up Party
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- Designed in the USAConsidered pieces, made to last
Girls Mermaid Costume – Transform Into an Enchanted Mermaid
This girls mermaid costume delivers a complete magical transformation with a shimmering mermaid tail dress, purple satin bodice, and metallic teal scale print that captures the wonder of the ocean. Made from polyester and tulle, the soft, comfortable fabric is perfect for Halloween parties, birthday celebrations, themed events, and all-day dress-up play. The included accessories—floral headband, toy wand, sequined purse, and jewelry set—make this a fully realized mermaid theme outfit ready to wear straight from the box.
A seasonal best seller every year — parents love this complete costume solution for Halloween and costume parties.
Halloween stock sells out fast — order early. Dispatched within 24–48 hours.
Why You'll Love This Girls Mermaid Costume
- Instant magical transformation: The metallic teal scale print, gold swirl pattern, and layered ruffle hem create an authentic mermaid tail dress silhouette that captures imaginations.
- Soft, comfortable fabrics: Polyester and tulle blend ensures kids can wear this mermaid theme dress all day without irritation, with sheer cap sleeves and a sheer peplum waist for easy movement.
- Complete accessory set included: Matching floral headband, toy wand, sequined purse, and jewelry set mean no additional shopping—everything needed for a full mermaid theme outfit is ready to go.
- Perfect for multiple occasions: Ideal for Halloween trick-or-treating, birthday parties, carnival events, photoshoots, role play, and fantasy-themed celebrations.
- Reusable year after year: Durable polyester and tulle construction holds up to repeated wear and storage, making this a costume that grows with your child or passes to siblings.
Perfect For
Halloween Parties & Trick-or-Treating: The complete mermaid theme outfit with accessories makes an eye-catching costume that stands out at any Halloween celebration or neighborhood trick-or-treat route.
Birthday & Themed Celebrations: Perfect for mermaid-themed birthday parties, carnival events, and fantasy-themed gatherings where kids want to fully embody their favorite ocean character.
Dress-Up Play & Role Play: The comfortable fabrics and included accessories encourage imaginative play, making this ideal for everyday dress-up, pretend play, and storytelling adventures.
Photoshoots & Special Events: The shimmering scale print, gold details, and coordinated accessories photograph beautifully for birthday portraits, event photos, and keepsake memories.
Specifications
- Material: Polyester and tulle
- Size Range: S, M, L, XL
- Style Options: Multiple styles available (A through L)
- Design Features: Metallic teal scale print, purple satin bodice, gold swirl pattern, sheer cap sleeves, sheer peplum waist, layered ruffle hem
- Included Accessories: Mermaid tail dress, toy wand, sequined purse, toy jewelry set
What's in the Box
- 1x Girls mermaid costume dress
- 1x Toy wand
- 1x Sequined purse
- 1x Toy jewelry set
Simply slip on the mermaid tail dress, add the matching floral headband, and accessorize with the included wand, purse, and jewelry for an instant complete look. The soft polyester and tulle fabric is comfortable for all-day wear. After the celebration, store flat or gently folded in a cool, dry place to keep this durable costume fresh and ready for next year's adventures.
Halloween is almost here — order now so your child's mermaid costume arrives in time for the festivities. We offer fast dispatch and a money-back guarantee, so you can shop with confidence.
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
