Mermaid Costumes

Q: What about the Little Mermaid sidekicks (Sebastian, Flounder, Prince Eric)?

We stock Flounder: Kids Little Mermaid Flounder Fish Costume, covering flounder fish costume. We do NOT currently stock dedicated Sebastian (red crab) or Prince Eric: tracked as range gaps. For Sebastian: red kids costume + crab claws accessory. For Prince Eric: pirate / sailor range with navy-blue jacket cut.

Q: Do you have plus size mermaid costumes?

Plus size limited. Sea Siren Sexy Lady Mermaid and Queen Neptune Adult have some plus-fit grading: check size selector, greyed-out = out of stock, email for restock timing. Ursula Ladies Deluxe runs standard adult sizing. Kids swimmable tails are kids-only: adult swimmable mermaid tails not currently stocked.

Q: What mermaid for kids Book Week?

Disney Playtime Mermaid Princess Ariel Book Week for Disney Little Mermaid theme. Magical Mermaid Toddler Child (Blue / Pink variants) for younger primary + Spotlight brand. For a memorable swim-themed Book Week: Kids Swimmable Mermaid Tail family: don't take into the school pool. Pair with Little Mermaid Princess Ariel Wig.

Q: How fast can I get a mermaid costume?

Same-day Melbourne dispatch on weekday orders before 2pm AEDT. Australia Post Express to most metro: delivery times depend on Australia Post and aren't guaranteed. Kids Swimmable Mermaid Tail family held in deep inventory year-round. Ursula and Disney Playtime Ariel restock every 4-6 weeks. Sea Siren and Queen Neptune are adult Halloween-peak styles: stocks tighten Sep-Oct.

Our mermaid range covers 48 items for girls, kids and adults - swimmable mermaid tails with monofins, Disney Ariel dresses, Ursula the sea witch, mermaid wigs, scale capes and sea-themed accessories. Sizes run from toddler through to adult, and everything ships from Melbourne with same-day dispatch before 2pm weekdays.

Mermaid Costumes

Swimmable Tails vs Dress-Up Costumes

26 of our mermaid items are swimmable tail sets - a bikini or swimsuit top, a fabric scale tail and a removable monofin so the tail can actually be worn in the pool. The remaining pieces are dress-up costumes for parties and Book Week: 7 Disney Ariel dresses (including deluxe and sequin versions), 3 Ursula sea-witch pieces (dress, child dress and villain wig), a Flounder fish costume, King Neptune and Neptune Queen outfits for adults, mermaid scale capes, a starfish headband and a red mermaid princess wig. 6 items are cut for adults or women; the rest are kids sizes.

Shop Related Costumes

Mermaid outfits are most often bought alongside these ranges.

Mermaid Costume FAQ

Can the mermaid tails actually be worn swimming?

Yes - 26 of our 48 mermaid items are swimmable tail sets supplied with a monofin, the plastic fin insert that slides into the end of the tail. The monofin is removable, so the tail can also be worn as a dress-up costume out of the water. Children should always be supervised when swimming in a tail.

Do you have Ariel and Ursula costumes?

Both. We stock 7 Disney-licensed Ariel costumes, including deluxe princess dresses, a sequin gown and a fur-trimmed cloak version, plus 3 Ursula sea-witch pieces: a women's dress with tentacles, a child's deluxe dress with pendant, and an upright white villain wig.

Are there mermaid costumes for adults?

Yes - 6 items in the range are cut for adults and women, including a Neptune Queen ocean-goddess dress, a King Neptune sea-god tunic with crown and cape, the Ursula villain dress and wig, and a mermaid starfish headband. The majority of the range is girls and kids sizing.

What comes in a swimmable mermaid tail set?

Most sets are three pieces: a bikini or swimsuit top, matching bottoms, and the scale tail with its monofin insert. Colours in stock include rainbow, aqua, pink, purple gradient and pink ombre. A spare black monofin insert is also sold on its own for tails that have lost theirs.

Is a mermaid costume a good Book Week outfit?

It is one of the most requested storybook looks. For a walking, classroom-friendly version choose a dress-style mermaid or Ariel costume rather than a swimmable tail, and add a red or aqua mermaid wig and a shell or starfish headband to finish it.

Kids Swimmable Mermaid Tail: Australia's Top Mermaid Tail

Our Girls Kids Mermaid Tail Swimsuit with Monofin is the category's most popular product: covering searches for mermaid tail mermaid, mermaid tails mermaid tails, swimtails mermaid tails, mermaid tails for kids, mermaid tail, childrens mermaid tails, childrens mermaid tails swimming, mermaid tail outfit, mermaid tail costume, mermaid swimsuit and mermaid tail for swimming. One product page covering 15 different mermaid-tail and mermaid-swimsuit search variations.

Swimmable Kids Mermaid Tail family: 25+ colour variants:

Standard tail-with-monofin bundles: blue, pink, purple, rainbow, green, custom colour variants
Kids Blue Mermaid Tail Monofin standalone
Kids Pink Mermaid Tail Monofin standalone
Monofin alone: replacement / upgrade fin
Sister Bikini + Tail sets
Multiple Girls Mermaid Costume Tail Swimsuit Bikini Sets across colour styles

The monofin is a swim flipper that fits both feet: the kid kicks dolphin-style. Important safety note: monofin swim-tails require adult supervision in deep water: the kid's legs are bound in the tail, so they must be a strong swimmer or wear a separate flotation device. We sell the monofin tail as a costume + swim toy, not a learn-to-swim device.

Disney Ursula: The Sea Witch

The Ladies Disney Ursula Deluxe Costume is our top adult mermaid-cat product: covering costume ursula disney, disney ursula costume and ursula costume. Disney-licensed purple sea-witch dress, tentacle skirt, white wig with tentacle accents. Pairs with the Ladies Disney Ursula Wig: white spiked styling.

Kids version: Ursula The Little Mermaid Deluxe Child for Halloween / Disney themed parties / Book Week villain pick.

Ariel (Disney Little Mermaid): Kids Range

Our Ariel range is currently kids-focused:

Disney Playtime Mermaid Princess Ariel Book Week: kids fancy dress, classic Disney Little Mermaid styling
Little Mermaid Princess Ariel Wig: red long wig, pairs with any mermaid tail or Disney Playtime Ariel
Deluxe Magical Mermaid Princess Girls: non-licensed mermaid princess alternative

About Adult Ariel: We don't currently stock a dedicated Disney-licensed Adult Ariel costume. If you need an adult Ariel look, the closest workaround is the Sea Siren Sexy Lady Mermaid + the Little Mermaid Princess Ariel Wig. If we add an Adult Disney Ariel in future, it'll appear in this category.

Adult Mermaid + Sea Royalty (Non-Disney)

Outside the Disney range:

Sea Siren Sexy Lady Mermaid Outfit Sea Princess: our only dedicated adult-fitted mermaid; sexy / Halloween cut
Mens King Neptune Deluxe: Roman/Greek-sea-king crossover, trident accessory
Queen Neptune of the Seas Adult: female sea queen alternative to Ursula
Lady Gaga Hawaiian Mermaid Seashell Shell Bra Luau: shell-bra accessory, doubles as Luau wear
Mermaid Crown Seashell Headpiece: accessory for styling any tail / dress

Generic Kids Mermaid (Spotlight + Non-Disney)

Magical Mermaid Toddler Child Costume Blue: Spotlight brand `mermaid costume spotlight` match; fancy-dress toddler / younger primary
Pink Magical Mermaid Toddler Child: pink variant
Kids Little Mermaid Flounder Fish Costume: yellow fish, covering `flounder fish costume` and `flounder costume`

What we don't currently stock: dedicated Sebastian (red crab), Prince Eric, Dark Mermaid (black gothic), Mermaid Bride. Our team's tracking these as gaps for future range expansion: for now, if you're hunting any of those, message Live Chat and we'll suggest the closest alternative.

Mermaid + Disney Little Mermaid FAQ

What's the top mermaid costume?

By popularity: our Girls Kids Mermaid Tail Swimsuit with Monofin: covers 15 different `mermaid tail / mermaid swimsuit` searches. For Disney adult fans: the Ladies Disney Ursula Deluxe (`costume ursula disney`). For kids Disney: Disney Playtime Mermaid Princess Ariel Book Week. For adult sexy: Sea Siren Sexy Lady Mermaid.

Are the kids mermaid tails actually swimmable?

Yes: the swimmable tail-with-monofin family is designed for pool / beach water use. The fabric is wetsuit-style (chlorine + saltwater resistant) and the monofin lets the kid dolphin-kick. However: the legs are bound inside the tail so the kid must be a strong swimmer or wear an additional flotation device. Adult supervision in deep water is required. We sell these as costume + swim toy, not a learn-to-swim aid. For dress-up parties only (no water), any colour variant works: pick on aesthetic. For pool / beach, the monofin standalone can also be swapped in / upgraded.

Do you have Ariel costume for adults?

Not as a dedicated Disney-licensed Adult Ariel: that style isn't currently in our range. Workaround: combine the Sea Siren Sexy Lady Mermaid with the Little Mermaid Princess Ariel Wig for a custom adult Ariel look. For Book Week / school: kids Disney Playtime Mermaid Princess Ariel is available.

What about the Little Mermaid sidekicks (Sebastian, Flounder, Prince Eric)?

We stock Flounder: the Kids Little Mermaid Flounder Fish Costume, covering `flounder fish costume`. We do not currently stock dedicated Sebastian (red crab) or Prince Eric styles: those are tracked as range gaps. If you need Sebastian, the closest workaround is any red kids costume + crab claws accessory. For Prince Eric (Ariel's prince), look in our pirate / sailor range for a navy-blue jacket cut.

Ursula vs Queen Neptune: which sea-villain costume?

Both work. Ursula is the Disney-licensed sea witch: instantly recognisable Little Mermaid villain. Queen Neptune is the non-Disney generic sea queen: same dramatic vibe, no licensing tie-in. For a Disney party: pick Ursula. For costume freedom (no character): Queen Neptune. Both pair with the trident accessory + Mermaid Crown Seashell Headpiece.

Do you have plus size mermaid costumes?

Plus size in this category is limited. The Sea Siren Sexy Lady Mermaid and Queen Neptune Adult both have some plus-fit grading: check the size selector on the product page; greyed-out sizes = out of stock, email us for restock timing. Ursula Ladies Deluxe runs standard adult sizing. The kids swimmable tails are kids-only: adult-sized swimmable mermaid tails are not currently in stock.

What mermaid for kids Book Week?

Two strong picks: Disney Playtime Mermaid Princess Ariel Book Week (name explicitly says Book Week) for Disney Little Mermaid theme; or the Magical Mermaid Toddler Child (Blue / Pink variants) for younger primary + Spotlight brand alignment. For a more memorable swim-themed Book Week, the Kids Swimmable Mermaid Tail family actually works as a Book Week costume: just don't take it into the school pool. Pair with Little Mermaid Princess Ariel Wig.

How fast can I get a mermaid costume?

We dispatch from Melbourne same day on weekday orders placed before 2pm AEDT. From there Australia Post Express to most metro areas: delivery times depend on Australia Post and aren't guaranteed. The Kids Swimmable Mermaid Tail family is held in deep inventory year-round across colour variants. Ursula and Disney Playtime Ariel restock every 4-6 weeks. Sea Siren and Queen Neptune are adult Halloween-peak styles: stocks tighten Sep-Oct.