Seashell Sequin Girls Mermaid Birthday Dress and Headband Set. Shimmering sequin bodice with blue glitter shell appliques, pastel tulle skirt, matching headband. The only set in the range to fit up to age 12. £28.99.
Every other mermaid dress in the range uses an iridescent fish scale fabric for the bodice. This one is different. The Seashell Sequin Mermaid Dress has a full sequin bodice: pink and gold flat sequins that shimmer brilliantly under party lighting and look genuinely striking in photographs. On top of that sequin base sit two large blue glitter shell appliques at the chest, along with small pink starfish embellishments scattered across the fabric. It is a bolder, more detailed bodice than anything else in the range.
It is also the only set that goes up to age 12, making it the right choice for older girls who still want to join in the mermaid fun at a themed party without being limited by a maximum age of 10. Machine washable as well as hand wash, which is a practical bonus for parents. At £28.99 for the complete two-piece set.
What Sets This Dress Apart
What’s in the Set
- 1 x mermaid birthday dress with pink and gold sequin bodice, blue glitter shell appliques, starfish embellishments, fish tail accent at the waist, pastel tulle skirt in lilac, aqua, and pink, wide white satin shoulder straps, and white satin ribbon detail at the back
- 1 x matching headband with blue glitter shell accents, pink starfish, purple tulle frill, and teal glitter mermaid tail fin
The Dress in Detail
The Sequin Bodice
The top half of the dress is covered in flat sequins in a mix of pink, gold, and white tones that catch and reflect light in every direction. Unlike holographic fish scale fabric, which shifts colour smoothly, flat sequins produce individual points of light that make the bodice sparkle intensely under party lighting, stage lighting, and camera flash. The effect is genuinely dazzling and makes this dress one of the most photogenic in the range.
The Shell and Starfish Appliques
Two large blue glitter shell appliques are positioned at the upper chest of the bodice, one on each side. They are raised above the sequin surface rather than printed or embroidered flat, which gives the front of the dress a three-dimensional quality. Small pink starfish are scattered between and below the shells, adding to the ocean-floor scene across the bodice. At the left side of the waist, a white mermaid tail fin accent is attached, giving one final nod to the mermaid theme at the point where the bodice meets the skirt.
The Shoulder Straps and Back
Rather than a halter neck style, this dress has wide white satin straps that sit over the shoulders, giving it a more secure fit that does not rely on a neck tie. The back is clean and open with a white elasticated panel across the bodice for comfort and flexibility. A long white satin ribbon extends from the back of the bodice down through the centre of the skirt, creating a distinctive stripe of white against the colourful tulle that is visible from behind and adds a decorative vertical element unique to this dress.
The Pastel Tulle Skirt
The skirt is made from multiple layers of soft tulle in lilac, aqua, and pink arranged in vertical panels. The layering gives it full, generous volume that falls to approximately knee length and swishes beautifully when moving. A row of small pink satin bows sits along the front waistline where the bodice meets the skirt, echoing the same detail seen on other sets in the mermaid range while remaining its own version of it.
The Colour
The overall palette is soft and feminine without being exclusively pink. The lilac and aqua tulle alongside the blue shell accents give the dress a cool, ocean-inspired feel that works across a range of party themes. For more inspiration on mermaid dresses for girls, take a look at our little girl mermaid dress guide.
Who Is This Dress For?
Parents of girls aged 1 to 12 who want the biggest size range in the mermaid collection: Every other mermaid set in the range stops at age 10. This one goes up to age 12, which matters for families with older daughters who love mermaid themes just as much as younger children. The 3XL size fits girls aged 11 to 12 years. Our birthday outfit ideas guide has styling suggestions for putting together the full party look.
Parents who want a sequin dress rather than a fish scale one: The sequin bodice produces a different kind of sparkle to the holographic fabric on the other sets. Under direct light or camera flash, flat sequins are more intensely bright and reflective. If the photoshoot look matters, or if your daughter prefers the classic glitter-and-sequin aesthetic over the iridescent scale effect, this is the right choice.
Parents who need an easier-to-wash mermaid dress: All the mermaid sets are hand washable, but this is the only one in the range that is also machine washable, which is a meaningful practical difference for a party dress that may see repeated use across birthdays, Halloween, and dress-up play. For more ideas on dressing girls for special occasions, browse our girls special occasion wear collection.
When to Wear This Set
Size Guide
This is the only dress in the mermaid range with a 3XL size covering ages 11 to 12 years. Sizes run from S (1 to 2 years) through to 3XL (11 to 12 years). Always measure rather than relying on age alone. Visit our girls size guide for full measuring instructions.
| Size Tag | Age Reference | Dress Length (cm) | Chest Min (cm) | Chest Max (cm) |
|---|---|---|---|---|
| S | 1 to 2 years | 45 | 45 | 50 |
| M | 3 to 4 years | 50 | 50 | 55 |
| L | 5 to 6 years | 55 | 55 | 60 |
| XL | 7 to 8 years | 60 | 60 | 65 |
| 2XL | 9 to 10 years | 65 | 65 | 70 |
| 3XL | 11 to 12 years | 70 | 72 | 72 |
Key Features at a Glance
- Full 2-piece set: mermaid birthday dress and matching headband
- Pink and gold flat sequin bodice (not fish scale fabric)
- Two large blue glitter shell appliques at the chest
- Pink starfish embellishments across the bodice
- White mermaid tail fin accent at the front waist
- Small pink satin bows along the waistline
- Multi-layered pastel tulle skirt in lilac, aqua, and pink, knee length
- Wide white satin shoulder straps for a secure over-the-shoulder fit
- White elasticated back panel with decorative white satin ribbon running down the centre back
- Headband with blue glitter shell accents, pink starfish, purple tulle frill, and teal tail fin
- Sizes S to 3XL covering ages 1 to 12 years (the largest range of any set in the collection)
- Machine washable and hand washable
Product Specifications
| Set Contents | 1 x mermaid birthday dress, 1 x mermaid headband |
| Material | Sequin, tulle, polyester |
| Bodice | Pink and gold flat sequins with blue glitter shell appliques and pink starfish embellishments |
| Waist Detail | Small pink satin bows, white mermaid tail fin accent |
| Skirt | Multi-layered pastel tulle in lilac, aqua, and pink, knee length |
| Straps | Wide white satin over-the-shoulder straps |
| Back | White elasticated bodice panel, white satin ribbon down the centre back skirt |
| Headband | Blue glitter shell accents, pink starfish, purple tulle frill, teal glitter mermaid tail fin |
| Colour | Pink, lilac, and aqua |
| Sizes | S (1-2y), M (3-4y), L (5-6y), XL (7-8y), 2XL (9-10y), 3XL (11-12y) |
| Suitable Season | Summer and any indoor occasion year-round |
| Gender | Girls |
| Condition | New |
Care Instructions
Machine washable Hand wash also suitable Do not bleach Air dry naturally
Reviews
There are no reviews yet.