Best Mermaid Adult Costume Outfits of 2025

The Smiffys Mermaid Costume is a delightful choice for anyone looking to embrace their inner mermaid. This costume features a stunning green full-length dress adorned with sequins, ensuring you stand out at any fancy dress event. It includes a stylish hair clip to complete your look. With specific size measurements for bust, waist, hip, and leg inseam, you can find the perfect fit. Plus, you can feel confident in your purchase, as all products are rigorously tested to meet the latest safety standards.

The Boland Mermaid Skirt is a stunning piece designed for your next fancy dress occasion. This long skirt, available in size M, is made from stretchy fabric that ensures comfort while allowing for ease of movement. Its scale pattern adds a whimsical touch, perfect for immersing yourself in a mermaid theme. The skirt's holographic material catches the light beautifully, making you stand out at parties and carnivals. Pair it with matching accessories for a complete look that is bound to impress.

The Carnavalife Mermaid Skirt is a stunning addition to any mermaid costume. Its original design features a glitter scale effect, making you stand out at any event. The skirt is made from comfortable, adjustable material that stretches at the waist, ensuring a perfect fit for everyday wear or special occasions. Additionally, it is easy to maintain; simply hand wash it with water and detergent, and it will be ready for your next adventure. This skirt combines style and practicality seamlessly.

The Smiffys Zombie Mermaid Costume is a unique outfit that features a striking purple top and a fishtail skirt, perfect for Halloween or fancy dress occasions. With a bust size of 40-42 inches, a waist of 32-34 inches, and hips measuring 42.5-44.5 inches, this costume caters to a range of body types, ensuring a comfortable fit. You can feel confident knowing that this costume has been thoroughly tested to meet EU and American safety standards, prioritising your safety while you enjoy the festivities. Additionally, each product arrives in Smiffys branded packaging, making it a great gift option.

The Fancy Me Mermaid Costume is a delightful outfit perfect for themed parties or fancy dress events. It includes trousers designed for comfort and style, allowing you to move freely while showcasing your unique mermaid look. The one-size design best fits UK sizes 10 to 14, ensuring a flattering fit for many body shapes. This versatility makes it an excellent choice for various occasions, helping you stand out effortlessly. With this costume, you can embrace your inner mermaid with ease and confidence.

The Disguise Ursula Costume is officially licensed by Disney and inspired by the iconic sea witch from The Little Mermaid. It features Ursula's signature purple gown with black accents, allowing you to truly embody this powerful character. Perfect for Halloween, cosplay conventions, or Disney-themed parties, this costume ensures you stand out at any event. Designed for comfort in sizes XS-XL, it provides a flattering fit while maintaining the bold and dramatic style of Ursula.

The AYYOHON Mermaid Costume offers a stunning four-piece outfit designed for Halloween or themed parties. The set includes a vibrant green mermaid skirt and a purple sequin tube top that adapts comfortably to your figure, ensuring you feel confident throughout the event. With its elastic rubber band, the tube top is easy to wear, while the adjustable pearl waist chain adds a touch of elegance. Complete your look with the charming starfish pearl headpiece, perfect for capturing unforgettable moments with friends.

The GRAJTCIN Skeleton Costume is a stylish choice for any Halloween celebration. This one-piece skeleton long dress features a striking 3D printed skeleton design on the front and sleeves, ensuring you'll stand out at any event. The long-sleeved pullover design with shoulder cutouts adds a fashionable twist to your spooky outfit. Whether you're attending a Day of the Dead celebration or a last-minute costume party, this dress is versatile and convenient, making it perfect for any occasion.

The Amscan Mermaid Costume offers a delightful way to create a mystical look for any occasion. It includes a stunning mermaid headpiece and a beautifully designed dress, perfect for Halloween or a costume party. Made from 100% quality fabric, this costume ensures you stay comfortable throughout your event. The fashionable design guarantees that you will stand out and look fabulous, making it an ideal choice for dress-up events and themed parties.

The Victorian Mermaid Skirt is designed with convenience in mind. You can keep the vibrant colours and durability intact by simply machine washing it in cold water. Avoiding bleach and iron will ensure it lasts longer. Be sure to check the size chart carefully, as the sizes tend to run small. If you find yourself between two sizes, opting for the larger size will guarantee a more comfortable fit. This delightful skirt is perfect for various occasions, including Halloween and cosplay events.