Mermaid Costumes & Accessories

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Make a splash with our magical Mermaid Costumes & Accessories Collection for babies, kids, adults, and pets! This sea-sational lineup features everything from sparkling scale-print skirts and glimmering fins to seashell tops, and an ocean headpiece that turn landlubbers of all ages into enchanting underwater royalty. Whether it's a baby’s first costume, a kid’s dreamy dress-up day, an adult’s ocean-inspired party look, or a pet’s paws-itively adorable mermaid moment, there’s something in this collection for every sea-loving soul. Dive into the fun and let your whole crew shine like treasures from the deep!

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Girls' Pink Magical Mermaid Costume
Girls' Pink Magical Mermaid Costume
Hear the ocean's call and embrace the sea breeze in this costume. Let your inner Ariel out with the help of this mermaid costume and attend your next party in a stylish, fun, and colorful fashion. With your new graceful look, any sea or ocean is lucky to have you as its rightful ruler! Swim to your next beach party, or even Halloween in this costume and dazzle everyone else with your elegance. The costume is made from polyester and includes a dress. Add a seastar as a headpiece, or a shell necklace for a more realistic look!
Girls' Blue Magical Mermaid Costume
Girls' Blue Magical Mermaid Costume
Swim across the ocean as the most enchanting princess of the sea. The Magical Mermaid Child Costume is an alluring outfit that your daughter will love wearing. It features a blue dress with sea themed detailing and translucent sleeves. Add a tiara to the ensemble for an even more majestic appeal. She'll be queen of the sea in this fantastic wardrobe. Mermaids are whimsical figures, many tales have been told about their bewitching appearances. They are a coveted legend of the ocean. Your girl will be the prettiest mermaid of the them all dressed in the Magical Mermaid Costume. Her ravishing looks will have all the seamen sailing the rough seas just to get a glimpse of her beauty. Dive into some fun with this phenomenal disguise.
Girls' Princess Mermaid Costume
Girls' Princess Mermaid Costume
Many old sailor stories told tales of beautiful mermaids frolicking in the ocean. You can have one in your very own home when you order the Childs Mermaid Deluxe Costume for your little girl. The stunning blue dress features sea shell designs at the bust and scale designs on the skirt.
Women's Blonde Mermaid Waves Wig
Women's Blonde Mermaid Waves Wig
Dive into enchantment with the Costumes.com Women's Blonde Mermaid Waves Wig. Embrace your inner mermaid and steal the spotlight with this long, soft, wavy wig. The shimmering and oceanic locks flow with every movement you make. In seconds, this wig will transform you into the star of any occasion. Effortlessly elevate your style with this luxurious hairpiece. With its timeless charm and aesthetic appeal, you'll captivate hearts and turn heads no matter where you are on Halloween. You’ll make waves when you wear this blonde mermaid wig. Elevate your look and channel the sea with this showstopping ocean-inspired wig.
Women's Green Mermaid Fin Skirt
Women's Green Mermaid Fin Skirt
Ditch the city life and embrace the sound of the ocean by becoming a mermaid and living underwater. Bond with the whales fish octopi and many more delightful creatures in this costume. Imagine what it would be like to have a new home completely underwater. In this costume you truly are a mermaid!
Women's Blue Mermaid Fin Skirt
Women's Blue Mermaid Fin Skirt
Any sailor or sea captain will be lucky enough to catch you! But what if they do? Strike a deal with them in this charming costume. If they let you go grant them a wish and if they don't? Well...drag them into the ocean since mermaids are actually pretty evil if you know your folklore.
Women's Monarch Butterfly Fantasy Wig
Women's Monarch Butterfly Fantasy Wig
Add a magical finishing touch to any costume with the Women’s Monarch Butterfly Fantasy Wig. This long-styled wig features flattering side bangs and a vibrant three-color blend of red, orange, and blonde, creating a striking, whimsical look. Perfect for storybook and fairytale characters, it pairs beautifully with unicorn, mermaid, clown, or monarch butterfly costumes, making it a versatile accessory for Halloween, cosplay, or themed parties. Transform your style instantly and bring bold, colorful fantasy flair to any outfit with this eye-catching fantasy wig.
Women's Peacock Fantasy Wig
Women's Peacock Fantasy Wig
Add vibrant, magical flair to any costume with the Women’s Peacock Fantasy Wig. This long, flowing wig features striking green and blue tones with perfectly styled side bangs, creating a bold, storybook-inspired look. Ideal for peacock, mermaid, unicorn, or other fairytale characters, it instantly elevates any Halloween, festival, cosplay, or themed outfit. Lightweight, easy to wear, and full of colorful charm, this peacock fantasy wig is the perfect accessory for bringing your fantastical costume visions to life.
Girls' Mermaid Princess Dress and Headband
Girls' Mermaid Princess Dress and Headband
Bring undersea adventures to life with this Girls’ Mermaid Princess Dress and Headband set, inspired by Disney’s Little Mermaid Ariel princess. Perfect for everyday dress-up or Halloween, this enchanting outfit features a flowing purple and teal dress with sleeveless design and sparkling silver ocean-inspired metallic accents throughout, capturing the magic of life under the sea. The matching headband, in teal and silver with charming seashell-shaped accents, completes the mermaid look and adds a playful, magical touch. Ideal for imaginative play, parties, or costume fun, this Ariel-inspired dress and headband set lets every little mermaid shine like royalty beneath the waves. (Wand and shoes sold separately.)
Girls' Mermaid Princess Wand
Girls' Mermaid Princess Wand
Make every underwater adventure magical with the Girls’ Mermaid Princess Wand, the perfect accessory for any Little Mermaid-inspired look. Featuring shimmering silver and teal details and topped with a sparkling teal heart-shaped gem, this wand adds just the right amount of sparkle for dress-up, Halloween, or party fun. Lightweight and easy for little hands to hold, it pairs beautifully with the matching Mermaid Princess Dress and headband, letting every little mermaid feel like royalty as she brings ocean-inspired fairytales to life.
Girls' Mermaid Princess Shoes
Girls' Mermaid Princess Shoes
Complete your little mermaid’s magical ensemble with these Girls’ Mermaid Princess Shoes. Featuring a dazzling all-teal shimmering finish and a playful open-toe design, these shoes add the perfect finishing touch to dress-up, Halloween, or party outfits. The 2-inch heel offers a comfortable lift while keeping little feet stylish and ready for underwater adventures. Designed to fit toddler shoe sizes 7–10, with a heel-to-toe length of 7.5 inches and a 1.5-inch width at the narrowest point, the one-size-fits-most design ensures an easy and secure fit. Sparkling, lightweight, and enchanting, these teal mermaid princess shoes perfectly complete any Ariel-inspired look.
Adult Ride-A-Mermaid Costume
Adult Ride-A-Mermaid Costume
Have you always wanted to be part of the deep blue sea and imagine a world so beautiful? If so we can have you living the dream for a day with the Ride a Mermaid Adult Costume! This one of a kind outfit will get some good laughs out of your family and friends but others will adore your new look. Can you imagine riding on the back of a pretty mermaid all day long to any event that will make people smile? The outfit comes with elastic pants that are comfy to wear and the pants feature all the mermaid you need. The realistic look will have everyone wondering where you found this piece from and some kids may even think you came straight from the movie The Little Mermaid. Have some fun in this enjoyable outfit that will be sure to bring you lots of attention this Halloween!