Make a splash at Book Week with this Little Mermaid Ariel costume for girls. The shimmering mermaid dress pairs a sparkly magenta bodice with a green fish-scale skirt and flowing fin hem — and you can build the perfect set with an optional red wavy wig, mermaid crown and shell jewellery. Ideal for Book Week, World Book Day, birthday parties, Halloween and everyday dress-up.
Why girls love this Ariel mermaid costume
Magical mermaid look — sequin bodice, sheer shoulder frills and a green scale-print fishtail skirt.
Build your own set — choose dress only, or add the wig, crown and jewellery to go all-out.
Comfortable to wear — soft, lightweight polyester with a little stretch for easy movement.
Six kids' sizes — fits ages 3 to 13 so siblings and friends can join in.
Book Week favourite — a much-loved princess that's always a hit.
Size guide
Size
Age
Height
Bust
Length
100
3–5 yrs
90–100 cm
58 cm
71 cm
110
4–6 yrs
100–110 cm
62 cm
77 cm
120
6–8 yrs
110–120 cm
66 cm
83 cm
130
8–9 yrs
120–130 cm
70 cm
89 cm
140
9–11 yrs
130–140 cm
74 cm
95 cm
150
11–13 yrs
140–150 cm
78 cm
101 cm
If your child is between sizes, we suggest sizing up. Please allow 1–2 cm variance as items are measured by hand.
Choose your option
Dress + Wig + Crown + Jewellery (full set)
Dress + Crown + Jewellery
Dress + Wig + Jewellery
Dress + Wig
Dress only
Crown + Jewellery set (one size)
Care instructions
Hand wash cold and hang to dry to protect the sequins and scale print.
Do not bleach, tumble dry or iron the decorated panels.
Gently shake out the wig before wearing for a fuller shape.
Frequently asked questions
What's included? It depends on the option you pick — from the dress on its own up to the full dress, wig, crown and jewellery set. The crown & jewellery can also be bought on their own.
What size should I order? Use the size guide above and choose by your child's height and age; if in between, size up.
Can she walk easily in the mermaid skirt? Yes — the skirt has a soft flared fin and a little stretch so kids can move and play comfortably.
Is it good for Book Week? Absolutely — Ariel is a much-loved princess, making this an easy, recognisable Book Week and dress-up choice.
This is an unofficial, fan-made costume inspired by a well-known character and is not affiliated with, licensed by, or endorsed by Disney or any related rights holders. Character name is used for description purposes only.
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