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Kids Mermaid Costumes

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Watch your child sparkle like a sea princess in our dazzling mermaid costumes for kids! Designed with bright colors, soft fabrics, and playful details, these outfits are perfect for imaginative adventures under the sea. Perfect for Halloween, dress-up, or themed parties, these costumes bring ocean dreams to life!
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Girls Sparkling Mermaid Costume Main
Sale - 20% Made By Us
$49.99$39.99-$49.99*
Girl's Little Mermaid Ariel Costume-2
Made By Us Exclusive
Kids Disney Ariel Costume Outfit
Video
Sale - 20% Made By Us
$49.99$39.99-$49.99*
Girl's Skeleton Mermaid Costume
Sale - 29%
$34.99$24.99-$34.99*
Pretty Purple Mermaid Child's Costume 1
Sale - 13% Made By Us
$39.99$34.99-$44.99*
Toddler Mermaid Costume
$24.99
Kids Poseidon Costume
Made By Us Exclusive
$49.99
Child Mermaid Costume
$29.99
Girls Dark Skeleton Mermaid Costume
Sale - 42%
$59.99$34.99-$39.99
Girls Mermaid Costume
Sale - 40%
$24.99$14.99-$24.99
Sweet Mermaid Child Costume
Sale - 44%
$44.99$24.99-$44.99
Infant Mermaid Costume Bunting
Sale - 14% Made By Us
Kids Bubbly Mermaid Costume
Sale - 38% Made By Us
$39.99$24.99-$39.99*
Little Mermaid Girls Ariel Classic Costume
Sale - 33%
Girl's Darkest Siren Costume
Sale - 50%
$19.99$9.99-$19.99
Girl's Sea Siren Costume Main
Clearance Made By Us
$59.99$29.99
Little Mermaid Live Action Child Ariel Costume
Sale - 50%
Kid's Playful Mermaid Costume-update
Made By Us Exclusive
Blue Seas Mermaid Deluxe Girls Costume
Sale - 22%
$44.99$34.99-$44.99
Little Mermaid Child Prestige Ariel Sound and Light Costume
Clearance  - 60%
Toddler Disney Ariel Costume
Coming Soon
Made By Us Exclusive
Blushing Beauty Mermaid Girl's Costume
Out of Stock
Girls Orca Mermaid Costume
Out of Stock
Kids Magical Mermaid Costume
Out of Stock
Kids Mermaid Wig
Out of Stock
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Make a splash this Halloween with our adorable collection of kids' mermaid costumes! Whether your little one dreams of shimmering under the sea, ruling the ocean as a mystical siren, or dressing up as their favorite mermaid princess, we have the perfect costume to bring their underwater fantasy to life. From classic mermaid tails to spooky deep-sea creatures, we offer a fin-tastic look for every little sea explorer!

For kids who love all things magical, our child mermaid costume collections features sparkling scale-patterned skirts, shimmery fabrics, and flowing fin designs that bring ocean dreams to life. Whether they prefer shades of aqua, purple, pink, or bold metallic hues, these costumes capture the beauty of the sea. Pair them with a matching tiara or a seashell wand for the perfect fairytale mermaid transformation.

If your child is a Disney fan, they'll love our Little Mermaid mermaid costumes! With signature green tails, seashell tops, and flowing red wigs, these outfits let them become their favorite princess. Whether they choose an elegant deluxe Ariel gown or a playful toddler Ariel costume, they'll be ready to be part of that world.

Not all mermaids are sweet and sparkly—some prefer the deep, dark waters! Our child skeleton mermaid costumes and deep-sea siren costumes add a hauntingly cool twist to the traditional mermaid look. Featuring dark color schemes, eerie designs, and gothic sea creature vibes, these costumes are perfect for kids who love a little mystery and magic with their Halloween style.

Even the tiniest sea creatures can join in on the fun! Our toddler and infant mermaid costumes are designed for comfort and cuteness, featuring soft fabrics, easy-to-wear styles, and adorable accessories like seashell headbands and tulle fins. Whether they're crawling, waddling, or twirling, they'll be the cutest little mermaid in the sea!

Add a glittery tiara, a seashell wand, or a light-up trident, and your kiddo will be aglow with the magic of their mermaid ensemble. To take your kiddo's mermaid look to the next level, try a colorful wig, face gems, or shimmery body glitter on the arms to complete their under-the-sea look. There's no doubt your little one will be ready for memorable moments if you add a little extra pizzazz to the outfit!

From dazzling princess mermaids to spooky sirens, our kids' mermaid Halloween costumes are perfect for the spooky season, costume parties, or everyday dress-up fun. So buy one of the outfits for sale on this page, add a little sparkle, and get ready for an unforgettable adventure under the sea!

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