1. Party King Women’s Under The Sea Mermaid Costume

Product Highlights

Rated 4.1/5 stars, this mermaid costume is the next big hit at your costume party. With a mermaid tail, shell bra, and pearl necklace, this costume is one of the most popular on Amazon.

Features

• Includes dress, top and necklace
• Skirt features iridescent mermaid print
• Sequin shell cup top features bejeweled details
• 97% Polyester, 3% Spandex

What we like about the Party King Women’s Under The Sea Mermaid Costume

The majority of the 140 reviews on Amazon are 4 stars and above. Women love the color, fit, and feel they have when wearing the costume. Many reviewers also loved the compliments that they received with it! 

What we don’t like about the Party King Women’s Under The Sea Mermaid Costume

The most common complaints about this mermaid costume from this seller in particular is the costume has been known to arrive torn up. While it doesn’t happen often, that’s still not ideal. Most customers who rated the costume 2 stars did so due to the poor quality citing that the costume falls apart- especially the pearl necklace. In most cases it fell apart within the first hour of wearing it. 

Pros 

• Easy return policy
• Under $50
• Not necessary to wear a bra with the top piece
• Communicative seller

Cons

• Cheaply made – some components fall apart easily
• Some struggle with the bra size being right (runs small according to most reviews)
• Stretchy skirt
• Doesn’t include hair accessories (unlike other costumes)

2. Mermaid Skirt with Hologram Finish, Halloween Maxi Skirt

Product Highlights

This high-waisted, body con mermaid skirt scored 4.6/5 stars with over 500 reviews. It’s perfectly suitable for many occasions from a costume party to a cocktail party. Just change the top and you’re set! 

Features

• 95% Polyester, 5% Spandex
• Body con (until the calf)
• Maxi skirt

What we like about the Mermaid Skirt with Hologram Finish

The seller also has a size chart on their Amazon page and the reviewers attest that the skirt comes true to size. Many women reviewed how they loved how they felt wearing it and received compliments at parties. Furthermore, many commented on how the high waist helped pull in stubborn bellies that they wanted to hide. 

What we don’t like about the Mermaid Skirt with Hologram Finish

While it’s not a con that it’s only the skirt, it does make it more expensive and time consuming to find and buy the bra and accessories to complete the mermaid costume. Some women reviewed the product saying they didn’t like it as their body type didn’t look good in it – only stick figures and very bodacious types work with the skirt. However, those were very few cases. 

Pros 

• Under $50
• Variety of color options for the skirt: green, blue, and purple
• Inclusive sizes (XS/S, S/M, M/L…)
• Covers stubborn belly fat

Cons

• Handwash only
• Skirt only
• Comes very long (wear heels or be prepared to possibly mend it)

3. Gem Sequin Bra with Iridescent Mermaid Skirt

Product Highlights

This particular two-piece mermaid costume sets the wearer apart from other mermaids with high quality, detailed material. 

Features

•  90% Polyester, 10% Spandex
•  Set Includes: Bra and Skirt

What we like about the Sequin Bra with Iridescent Mermaid Skirt 

It’s a wrinkle free material which makes it super easy to pack and take to your final destination (so you aren’t dressed as a mermaid driving down Main St. in February). While the price is higher, reviewers also say the quality comes with the price.

What we don’t like about the Sequin Bra with Iridescent Mermaid Skirt 

It is on the more expensive end of the mermaid costumes offered on Amazon and has lower ratings than most of the cheaper options. While mermaids are known to come in multiple colors, this costume only comes in one – turquoise. 

Pros 

• Looks better in person than in the pictures

•  High quality
•  Detailed sequin bra

Cons

• The bra top runs small in size
• Accessories sold separately
• Reports from past shoppers that if the costume is returned, there is no refund 
• Around $100

4. Women’s Mermaid Tail Costume Sequin Maxi Skirt Cosplay Halloween Party Dress

Product Highlights

This sequin skirt is popular with 4.1/5 stars and over 500 reviews. Reviewers love the way the sequins gleam making this a great outfit for any underwater-themed party. 

Features

• 100% Polyester with sequins on the outside 
• Zipper closure
• Mid-waist, floor length
• Elastic waist

What we like about the Mermaid Tail Costume

What reviewers love most: the fact that it’s flexible and easy to move in. Furthermore, it’s proven to be a durable, lasting material which makes it a good bang for your buck!

What we don’t like about the Mermaid Tail Costume

The skirt comes with an Asian size tag so when checking out you must pay special attention to the US size equivalents. Furthermore, the green option only comes in a size Small. Blue is the only color option for sizes bigger than a small. 

Pros 

• Good quality/well-made
• Fair pricing for product
• Moveable material
• Vibrant, mermaid-like color

Cons

• Doesn’t have US size equivalents on the tags
• Many complains about sizing being wrong upon delivery
• Exchange not an option – the product must be returned and rebought
• The color of the sequins fades after long wear and tear

5. Mermaid Costume Leggings

Product Highlights

A classic, walkable mermaid legging which gives the perfect touch of fun to any mermaid costume. 

Features

• 100% polyester
• Comes in three colors – green, pink, and blue 

What we like about the Mermaid Costume Leggings

As they’re leggings, they’re easy to walk in. It’s also easy to make them look like a uniform fin by putting your legs together. With the metallic finish, it’s easy to fix and match different mermaid tops. 

What we don’t like about the Mermaid Costume Leggings

Due to the one size fits all, many women who are considered average weight and height complained that the size is far off and too small for them. Others said that the pants fit, but in a very weird way which made them uncomfortable to wear. 

Pros 

• Easy-to-alter material and design  
• Under $50
• Easy to make a group costume of different colors due to the brands variety of colors in its products 

Cons

• Only comes with the leggings – accessories sold separately  
• One size option (one size fits most)
• Runs small

6. The Little Mermaid Ariel Ultra Prestige Costume

Product Highlights

This officially licensed Disney product is a one-stop shop and buy as the dress has everything any mermaid needs – a tail, a top, and pazazz. It’s fantastic for any Disney party or a fishy get-together with friends. 

Features

• 100% Polyester
• Product includes: dress
• Officially licensed Disney product

What we like about the Little Mermaid Ariel Ultra Prestige Costume

With 4.7 out of 5 stars, this dress is a hit for all of its purchasers. 

What we don’t like about the Little Mermaid Ariel Ultra Prestige Costume

Unfortunately, the dress is known to be difficult to zip up if you’re curvy which means it isn’t very stretchy, either. 

Pros 

• Has no 1-3 star reviews, only 4 and 5 stars!
• Has a pearly mermaid sheen on the costume

Cons

• Between $50-$100
• Hand wash only 
• Not a great fit for curvy figures

7. Glitter Mermaid Bikini High Waist Swimsuit

Product Highlights

This high waisted swimsuit looks good both on land and in the deep blue sea. However, it doesn’t have to just be used for swimming. Unlike the other long-tailed/skirted costumes, this costume works perfectly for hot weather parties so you can look good without getting too hot. 

Features

• Bikini set (top and bottom)
• Made from polyester and spandex

What we like about the Glitter Mermaid Bikini High Waist Swimsuit

Great quality for an inexpensive price. The bikini strap is detachable for a strapless Ariel vibe, as well. What’s more is that it works for a variety of situations! Add in some extra fishnet stockings to top it off!

What we don’t like about the Glitter Mermaid Bikini High Waist Swimsuit

The green coloring on the bottoms has been known to wear off easily. Also, the sizing is off for many women in the bottoms, but mainly in the top area. There is no button to order separate top/bottom sizes. 

Pros 

• High-waisted
• Stretchy
• Good quality

Cons

•  Not a wide selection of sizes available
•  Hand wash only
•  Not physically supportive for big bust sizes

8. Sea Siren Princess Dress

Product Highlights

Unlike most other mermaid costumes, these mythical, darker colors set this mermaid costume dress apart. With its dark but feminine features, this dress can be used for both good and evil- themed costumes while still looking fantastic and mermaid-esque!

Features

• 100% polyester  
• Included: dress (accessories sold separately)

What we like about the Sea Siren Princess Dress

The design of this dress is different from other mermaid dresses on the market – off the shoulder straps, darker colors, ankle length, and flare design (which allows for curvier body types). 

What we don’t like about the Sea Siren Princess Dress

Considering the lack of reviews and purchases of the product, there isn’t anything we don’t like yet!

Pros 

• Under $50  
• Of the three ratings on Amazon, two are above 4 stars

Cons

• Only three ratings on Amazon
• Hand wash only 

9. Adult Mermaid Costume

Product Highlights

Good quality mermaid dress that has a fitted fishtail-style bottom and seashell cup top in pastel blue and pink shades. This dress is great for a costume party or simply brightening up the room with bright colors and fun design!

Features

• 100% Polyester
• ​​Pull-on closure  
• Includes a dress and a matching headband

What we like about the Mermaid Costume

This costume is known for its good quality for a good price. It is colorful, popular, and comes with an accessory (the headband) which most other mermaid costumes don’t have nor come with. 

What we don’t like about the Mermaid Costume

While the design is nice, it doesn’t allow for bust support as the top isn’t well padded or braced. Many reviews say the sizing is off enough that they need to adjust/mend it themselves; however, it’s not so far off that they need to return it. 

Pros 

• Less than $50  

• There is a size chart available, and seller and reviewers attest to the product running true to size
• Comes with headband accessory

Cons

• Not greater for curvy/busty body types   
• Runs large in the chest area

10. Mermaid Queen Costume

Product Highlights

Why be a simple mermaid when you can take it to the next level by being a Mermaid Queen? This ensemble will without a doubt help you rule at the next costume party. 

Features

• 100% nylon 
• Includes: dress, belt, crown, and pair of wrist cuffs (of which is made with shimmering sequins and golden accessories) 

What we like about the Mermaid Queen Costume

The sizing runs large on this product which is great – mainly because most other mermaid costumes have trouble being too small in the bust department. 

What we don’t like about the Mermaid Queen Costume

It’s necessary to wear tights underneath so the material, although it’s thick, doesn’t rub your skin the wrong way. 

Pros 

• Thick, well-made material  
• Great for curvy figures
• Includes accessories

Cons

• Rough-on-some-skin material  
• More expensive than other costumes (but it does come with more accessories than other, cheaper options)