Little Mermaid Ariel Costume Kids Girls Dress Wig Crown Book Week Fancy Dress

Description

Dive into Book Week 2026 with this Ariel costume for girls — a magenta bodice with shoulder frills and a shimmering green scale-print fishtail skirt that captures the little mermaid look the moment she walks into the room.

This is the Ariel costume Australian parents keep coming back to, because it gets the details right where it counts. The fitted magenta bodice with soft shoulder frills sits comfortably without digging in, and the green scale-print skirt has enough stretch through the body to let a child walk, sit and dance normally while still tapering to a proper fishtail silhouette. Six package options mean you can buy just the dress or build the full look with the red wig, crown and jewellery set.

Choose Your Ariel Costume Package

Ariel Costume Size Guide

All measurements are in centimetres and taken flat. Sizes are named by child height — measure from the top of the head to the floor without shoes.

The wig, crown and jewellery are one size and suit the full age range.

Sizing tip: The bodice has some stretch but the dress length is fixed, so height is the measurement to trust. If your child is between two sizes, or tall for her age, order the larger size — a slightly long fishtail hem looks elegant and intentional, while a short one rides up at the knee and spoils the silhouette.

Why Parents Choose This Ariel Costume

• The silhouette is right — a proper tapered fishtail skirt with scale print, not a plain green tube, which is what separates a convincing mermaid costume from a disappointing one.
• She can actually move in it — the polyester has stretch through the body, so walking in the parade, sitting on the mat and dancing at a party all work without splitting a seam.
• Six packages, six price points — buy the dress alone or the complete set with wig, crown and jewellery, so you spend exactly what suits your budget.
• Comfortable for a full day — soft shoulder frills instead of stiff structured straps means no rubbing under the arms by the afternoon.
• Endless re-wear — after Book Week it becomes the most requested costume in the dress-up box, and it works for birthday parties, ocean days and Halloween.

Fabric & Care

The dress is made from polyester with stretch, selected so the fishtail shape holds while still allowing a child full movement. The scale print and decorative panels are the feature of this costume, so they need a gentle hand.

Hand wash gently in cold water. Do not bleach. Hang dry in the shade — direct sun will dull the green scale print over time. Do not tumble dry. Do not iron over the decorative panels or scale print; use a cool iron on plain areas only if needed. Shake the wig out and comb it through gently with your fingers or a wide-tooth comb before wearing, as it will be compressed from shipping. Store the crown and jewellery separately so they do not snag the fabric.

Please allow a 1–3 cm variance in flat measurements, which is normal for costume garments of this construction.

Book Week and Party Styling Ideas

The Little Mermaid began as a Hans Christian Andersen fairy tale and has been retold in countless picture books and junior novels since, which makes Ariel one of the safest and most literature-grounded Book Week choices available. Bring a copy of the story along on the day and the entry speaks for itself. Style her with bare feet or simple flat sandals, add the red wig if her own hair is not long, and let the crown and shell jewellery finish the look without piling on extras.

For birthday parties and photos, the costume works beautifully against blue, teal or sunset-toned backdrops, and the fishtail catches the light when she spins. Pair with friends as Ursula, Flounder or a group of sea creatures for a class entry, or match siblings in different princess costumes for an easy family theme. It also carries through the year for pool parties, ocean-themed days and school concerts.

Frequently Asked Questions

Does the Ariel costume come with the wig?
Only in the packages that list it. Choose Dress + Wig + Crown + Jewellery, Dress + Wig + Jewellery or Dress + Wig if you want the red wig included.

What size should I order for my daughter?
Measure her height in centimetres and match it to the chart above. Sizes run from 100 (90–100 cm) to 150 (140–150 cm). If she is between two sizes, order the larger one.

Can she walk and run in the fishtail skirt?
Yes. The skirt tapers for the mermaid silhouette but the fabric has stretch through the body, so she can walk, sit cross-legged and dance comfortably. It is not a restrictive tail.

Is the costume comfortable for a full school day?
Yes. The bodice has soft shoulder frills rather than stiff straps, and the stretch polyester is lightweight and breathable, so it stays comfortable from the morning parade through to home time.

Will it arrive in time for Book Week?
We dispatch quickly from within Australia and prioritise Book Week orders through August. Order as early as you can — Ariel is one of our most popular costumes and the mid-range sizes sell out first.

Fast Australian Shipping

We ship this Ariel costume Australia-wide with tracked delivery to Sydney, Melbourne, Brisbane, Perth, Adelaide, Hobart, Canberra and Darwin, as well as regional and remote addresses in every state and territory. Orders placed on business days are packed and dispatched promptly and you will receive tracking details by email as soon as your parcel leaves us. For Book Week we recommend ordering early, because August is our busiest period and the most popular sizes move quickly.

This is an unofficial, non-licensed costume inspired by popular characters. Lets Party is not affiliated with, licensed by, sponsored by or endorsed by Disney, or any other rights holder of The Little Mermaid. All character names are used descriptively to help customers identify the style of costume.