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Mermaid Costumes

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When you’re looking for a captivating costume, you can’t go wrong with a mermaid costume! Your child will look great in one of our girl’s mermaid costumes while you stun in any of our mermaid costumes for adults! There’s something for everyone in our selection of mermaid Halloween costumes, from mermaid tail skirts to wigs and golden accessories, you’ll find everything you need for an excellent Halloween!
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1 - 60 of 202
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Girls Sparkling Mermaid Costume
Sale - 20% Made By Us
$87.99$69.99-$87.99*
Men's Salty Merman Costume
Made By Us Exclusive
Kid's Playful Mermaid Costume
Made By Us Exclusive
Girl's Dark Skeleton Mermaid Costume
Sale - 42%
Womens Spooky Siren Costume
Sale - 64% Made By Us
$87.99$31.99-$87.99*
Girls Mermaid Costume
Sale - 40%
$43.99$26.99-$43.99
Girl's Skeleton Mermaid Costume
Sale - 29%
$61.99$43.99-$61.99*
Infant Mermaid Costume Bunting
Sale - 14% Made By Us
Plus Size Women's Undersea Mermaid Costume
Sale - 15% Made By Us
Women's Deep Sea Mermaid Costume
Sale - 17% Made By Us
$104.99$87.99-$122.99*
Deluxe Under the Sea Beauty
Sale - 31% Made By Us
Pretty Purple Mermaid Child's Costume
Sale - 13% Made By Us
Women's Shell-a-brate Mermaid Costume
Sale - 58% Made By Us
Under the Sea Mermaid Women's Costume
Sale - 27%
Little Mermaid Live Action Child Ariel Costume
Sale - 50%
Little Mermaid Girls Ariel Classic Costume
Sale - 33%
Men's Mermaid Mafia Costume
Clearance  - 60%
Girl's Darkest Siren Costume
Sale - 50%
Women's Under the Sea Mermaid
Sale - 69%
Girl's Sea Siren Costume Main
Clearance Made By Us
Men's Poseidon Costume
Made By Us Exclusive
Adult Mermaid Costume
Made By Us Exclusive
Poseidon Plus Size Men's Costume
Made By Us Exclusive
Plus Size Salty Merman Costume
Made By Us Exclusive
Women's Venus Mermaid
Sale - 44%
$157.99$87.99-$157.99*
Kids Poseidon Costume
Made By Us Exclusive
Women's Sea Siren
Made By Us Exclusive
Mens Sexy Poseidon Costume
Made By Us Exclusive
Adult Sweet Mermaid Costume
Sale - 33%
Kids Bubbly Mermaid Costume
Sale - 38% Made By Us
$69.99$43.99-$69.99*
Womens Deep Sea Siren Costume
Sale - 22%
$157.99$122.99-$157.99
Blue Seas Mermaid Deluxe Girls Costume
Sale - 22%
Mermaid Star Headband
Sale - 20% Made By Us
Aquatic Arm Fins
Clearance Made By Us
Silver Trident
Made By Us Exclusive
Seahorse Shimmer Fin Arm Cuffs
Made By Us
Hot Pink Long Wavy Wig
Sale - 40% Made By Us
Mermaid Shell Headband
Sale - 80% Made By Us
Bright Teal Wavy Wig
Sale - 35% Made By Us
Deluxe Women's Wicked Sea Witch Wig
Sale - 14% Made By Us
Royal Blue Bob Wig
Sale - 35% Made By Us
$34.99$22.99
Dark Purple Long Wavy Wig
Made By Us Exclusive
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We contend that Mermaids aren't real no matter how many of those weird documentaries on the History Channel say they are! We need ireffutable proof... but wait a minute... there's been a new sighting and it's pretty compelling... this can't be, but mermaids ARE real and they've been sitting right here at Halloweencostumes.com this entire time! This is remarkable! We're looking through our spyglass here and we see mermaid costumes for kids and women both, from sexy to classic styles, and even mermaid costumes that recreate a certain animated character that loves to sing on rocks! Someone call a documentary crew because we've got the scoop of the century here! 

Whether you want a sexy mermaid costume, a stunning girls mermaid outfit, a goth mermaid costume, or even an under the sea warrior - we have it all! 

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