15 Gorgeous DIY Mermaid Costumes You Can Throw Together at the Last Minute

There’s nothing fishy about scrambling to find your perfect Halloween costume. If you want an adorable look that doesn’t require too much time to assemble, we recommend throwing together one of our favorite costumes: a DIY mermaid.
These DIY mermaid costumes are easy to recreate and so cute. No matter if you want to replicate classic Disney characters or want to put your own unique spin in this classic, see how you can craft (or buy) your own below. Now, go re-watch The Little Mermaid so you know all the lyrics to “Part of Your World” and “Under the Sea” for October 31.
DIY Glam Mermaid Costume

More DIY Ideas

Yoni Goldberg for LaurenConrad.com

For a glam approach to the classic mermaid costume, Lauren Conrad crafted a DIY look we can’t get enough of. Decorate a bodice with seashells and make your tail out of sequined fabric for your most Insta-worthy costume yet.

What You’ll Need for a Glam Mermaid Costume

Seashell Bra
fearless apparel amazon.com
$7.88

Bustier
jezebel amazon.com
$54.00

Sequin Dot Mesh Fabric
vogue group inc amazon.com
$6.09

Seashells
super z outlet amazon.com
$9.99

DIY Mermaid Costume with Leggings
This content is imported from Instagram. You may be able to find the same content in another format, or you may be able to find more information, at their web site.

If you’re dressing up super last-minute, you might be able to find items in your closet that help you put together your costume. Mermaid leggings are popular for working out, but they make a quick alternative for a mermaid’s tail. Pair with a purple top and, if you have, a seashell purse and some colored hair spray to finish the look.

What You’ll Need for a Mermaid Leggings Costume

Mermaid Fish Scale Leggings
Diamond keep it amazon.com
$12.99

Sequin Tube Top
Alivila.Y Fashion amazon.com
$15.99

Seashell Purse
Felice amazon.com
$19.99

Temporary Hair Color Spray
L’Oreal Paris amazon.com
$8.70

DIY Mermaid Costume with a Skirt
This content is imported from Instagram. You may be able to find the same content in another format, or you may be able to find more information, at their web site.

Whether you’re dressing up your toddler, or looking for an easy way to really nail the mermaid tail (sans tail), a skirt is a great option. Just note that some mermaid skirts will cinch below the knees and flare at the bottom, slightly restricting movement. If you have a green or blue maxi skirt, that can work as well.

What You’ll Need for a Mermaid Skirt Costume

Sequin Mermaid Skirt
carkendesign etsy.com
$44.00

Fish Scale Skirt
Jescakoo amazon.com
$21.90

Ribbed Knit Cami Top
SheIn amazon.com
$14.50

Hologram Mermaid Skirt
Forplay amazon.com
$31.30

DIY Mermaid Costume with a Tail
This content is imported from Instagram. You may be able to find the same content in another format, or you may be able to find more information, at their web site.

A handful of websites — including Amazon and Walmart sell — full-on mermaid tails. Match it with a bathing suit or bandeau top and accessorize with shell jewelry. The commitment is sure to win you Best Costume.

What You’ll Need for a Mermaid Tail Costume

Mermaid Tails
Fin Fun walmart.com
$89.95

Shell Flower Earrings
AccentedGlory amazon.com
$20.00

Purple Monokini
Ekouaer amazon.com
$32.99

Shell Headband
AccentedGlory amazon.com
$32.00

DIY Mermaid Dress Costume
This content is imported from Instagram. You may be able to find the same content in another format, or you may be able to find more information, at their web site.

For an outfit that’s no frills but still clearly portrays that you’re dressing up as a mermaid, you can opt for a mermaid scale dress. Just make sure to apply colorful lipstick and maybe add a flower crown to finish the look.

What You’ll Need for a Mermaid Dress Costume

Mermaid Scale Dress
Lesubuy amazon.com
$12.99

Women’s Fish Dress
Fanient amazon.com
$19.99

Green Sequin Flats
Silky Toes amazon.com
$16.99

Metallic Shine Lipstick
UOMA Beauty ulta.com
$26.00

DIY Ariel Costume
This content is imported from Instagram. You may be able to find the same content in another format, or you may be able to find more information, at their web site.

It’s pretty easy to replicate the Disney princess, even if you don’t have time to buy extra accessories. You can sub in a seashell bra with a purple crop top or tube top, and wear a green maxi dress for the tail. The wig might be the only prop you need to buy!

What You’ll Need for an Ariel Costume

Flounder Plush
Disney amazon.com
$19.49

Red Wig
ANOTHERME amazon.com
$19.99

Purple Crop Top
iHeartRaves amazon.com
$27.95

Green Maxi Mermaid Skirt
RED DOT BOUTIQUE amazon.com
$32.99

DIY Mermaid Man Costume
This content is imported from Instagram. You may be able to find the same content in another format, or you may be able to find more information, at their web site.

Let’s not forget about the iconic character in Spongebob, Mermaid Man. His costume is relatively easy to emulate with a few basic essentials you probably already have at home. For the star face mask and belt, you can use purple felt.

What You’ll Need for a Mermaid Man Costume

Men’s Long Sleeve Shirt
Jerzees amazon.com
$7.84

Mermaid Shell Bra
LoveCarolineO etsy.com
$16.50

Teal Dishwashing Gloves
Pacific PPE amazon.com
$8.88

Men’s Blonde Wig
OYSRONG amazon.com
$14.59

DIY Kids’ Mermaid Costume

More DIY Ideas

Sewing Rabbit

In this tutorial, The Sewing Rabbit shows us how to turn your little one into a mermaid. Your child (and everyone you see on Halloween) will be wowed by how you transform organza into an incredible tail. If you follow the directions, you should be able to finish in 90 minutes!

What You’ll Need for a Kids’ Mermaid Costume

Irridescent Organza Fabric
ben textiles inc. amazon.com
$7.02

Purple Jersey Fabric
sy fabrics amazon.com
$6.99

Leotard
danshow amazon.com
$12.98

Tights
we love colors amazon.com
$10.95

DIY Mermaid Costume for Toddlers
This content is imported from Instagram. You may be able to find the same content in another format, or you may be able to find more information, at their web site.

You can actually purchase mermaid swimsuit sets that come with mermaid tails that flow beautifully in water. For something more foot-friendly, opt for a mermaid dress paired with an ornate floral crown.

What You’ll Need for a Mermaid Costume for Toddlers

Mermaid Tail Bikini Set
Lovely Mermaid amazon.com
$27.99

Girls’ Mermaid Dress
uideazone amazon.com
$14.99

Flower Crown
EllisOriginals501 etsy.com
$30.00

Seashell Hair Clips
Forever21 forever21.com
$7.50

DIY Mermaid Costume for Babies
This content is imported from Instagram. You may be able to find the same content in another format, or you may be able to find more information, at their web site.

A ton of mermaid tail crochet tutorials live on YouTube — you just need a little patience and a lot of yarn. If you’re running low on time, Etsy has quite a few adorable mermaid sets that easily slip on your baby. As always, make sure the costume doesn’t include small parts that your baby can chew on.

What You’ll Need for a Mermaid Baby Costume

Crochet Mermaid Set
Pinbo amazon.com
$13.99

Mermaid Headband
YanJie amazon.com
$12.99

Craft Yarn
Mira HandCrafts amazon.com
$17.97

Mermaid Tutu Set
LilyandMaxCo etsy.com
$32.00

DIY Mermaid Makeup

More Makeup Ideas

YouTuber/Valerie Pac

If you’re swimming in beauty products, you may consider copying this makeup design by YouTuber Valerie Pac. Follow along in this video to see her scaly, stunning look.

What You’ll Need to Create Mermaid Makeup

Killawatt Foil Freestyle Highlighter
FENTY BEAUTY by Rihanna sephora.com
$36.00

Hair and Body Glitter
CAI BEAUTY NYC amazon.com
$8.95

Juvia’s Place The Warrior III Eyeshadow Palette
Juvia’s Place ulta.com
$20.00

Lip Whip Gloss
Beauty Bakerie ulta.com
$18.00

DIY Mermaid Face Paint
This content is imported from Instagram. You may be able to find the same content in another format, or you may be able to find more information, at their web site.

A good face paint job can elevate a costume tenfold (or make up for a lack of one). You will need a little patience and artistic skill, but the results will be worth it. Add face jewels or pearls for extra points.

What You’ll Need to Create Mermaid Face Paint

Face Paint Kit
Zenovika amazon.com
$19.99

Rhinestone Mermaid Face Jewels
COKOHAPPY amazon.com
$8.99

Face Paint Brush Set
BOSOBO amazon.com
$6.99

Synthetic Artist Sponges
ROYAL BRUSH amazon.com
$4.05

DIY King Triton Budget Costume
This content is imported from Instagram. You may be able to find the same content in another format, or you may be able to find more information, at their web site.

In times that we don’t have the resources, we need to get creative. We love how this man used a broom and trash bag to recreate King Triton’s trident and beard. If you have a little more time, you can quickly purchase the merman’s props on Amazon.

What You’ll Need for a King Triton Costume

King’s Crown
Adorox amazon.com
$6.99

Trident
Forum Novelties amazon.com
$14.99

Wig and Beard Kit
Rubie’s amazon.com
$14.94

Blue Tights
TSLA amazon.com
$14.98

DIY Scary Mermaid Costume
This content is imported from Instagram. You may be able to find the same content in another format, or you may be able to find more information, at their web site.

Not all mermaids are friendly. The fantasy creatures can be scary too, especially if you go a little daring on the makeup. Wear clothing and accessories of deeper green, blue, and purple shades.

What You’ll Need for a Scary Mermaid Costume

Mehron Makeup Paradise Makeup AQ Face & Body Paint
Mehron amazon.com
$11.95

Cosplay Wig for Women
AneShe amazon.com
$12.99

Novelty Monster Teeth
Rubie’s amazon.com
$7.80

Gold Mermaid Costume Crown Headband
elope amazon.com
$9.99

DIY Mermaid Costume for Pets

This content is imported from Instagram. You may be able to find the same content in another format, or you may be able to find more information, at their web site.

Yep, even pets can join in on the mermaid fun — if they’re up for it! Beyond two-piece mermaid costume kits, you can dress your dog or cat in mermaid blankets, collars, and even life jackets. Just remember if your dog is feeling uncomfortable in the costume, don’t force him or her to stay in it.

What You’ll Need for a Mermaid Costume for Pets

Dog Ariel Costume
Rubie’s amazon.com
$23.34

Cat Mermaid Costume
KadieCrochets etsy.com
$66.00

Mermaid Pet Collar
Love4Pawz etsy.com
$18.49

Dog Life Jacket
deenkk amazon.com
$23.99

This content is created and maintained by a third party, and imported onto this page to help users provide their email addresses. You may be able to find more information about this and similar content at piano.io

There’s nothing fishy about scrambling to find your perfect Halloween costume. If you want an adorable look that doesn’t require too much time to assemble, we recommend throwing together one of our favorite costumes: a DIY mermaid.

These DIY mermaid costumes are easy to recreate and so cute. No matter if you want to replicate classic Disney characters or want to put your own unique spin in this classic, see how you can craft (or buy) your own below. Now, go re-watch The Little Mermaid so you know all the lyrics to “Part of Your World” and “Under the Sea” for October 31.

DIY Glam Mermaid Costume

More DIY Ideas

Yoni Goldberg for LaurenConrad.com

For a glam approach to the classic mermaid costume, Lauren Conrad crafted a DIY look we can’t get enough of. Decorate a bodice with seashells and make your tail out of sequined fabric for your most Insta-worthy costume yet.


DIY Mermaid Costume with Leggings

This content is imported from Instagram. You may be able to find the same content in another format, or you may be able to find more information, at their web site.

If you’re dressing up super last-minute, you might be able to find items in your closet that help you put together your costume. Mermaid leggings are popular for working out, but they make a quick alternative for a mermaid’s tail. Pair with a purple top and, if you have, a seashell purse and some colored hair spray to finish the look.


DIY Mermaid Costume with a Skirt

This content is imported from Instagram. You may be able to find the same content in another format, or you may be able to find more information, at their web site.

Whether you’re dressing up your toddler, or looking for an easy way to really nail the mermaid tail (sans tail), a skirt is a great option. Just note that some mermaid skirts will cinch below the knees and flare at the bottom, slightly restricting movement. If you have a green or blue maxi skirt, that can work as well.


DIY Mermaid Costume with a Tail

This content is imported from Instagram. You may be able to find the same content in another format, or you may be able to find more information, at their web site.

A handful of websites — including Amazon and Walmart sell — full-on mermaid tails. Match it with a bathing suit or bandeau top and accessorize with shell jewelry. The commitment is sure to win you Best Costume.


DIY Mermaid Dress Costume

This content is imported from Instagram. You may be able to find the same content in another format, or you may be able to find more information, at their web site.

For an outfit that’s no frills but still clearly portrays that you’re dressing up as a mermaid, you can opt for a mermaid scale dress. Just make sure to apply colorful lipstick and maybe add a flower crown to finish the look.


DIY Ariel Costume

This content is imported from Instagram. You may be able to find the same content in another format, or you may be able to find more information, at their web site.

It’s pretty easy to replicate the Disney princess, even if you don’t have time to buy extra accessories. You can sub in a seashell bra with a purple crop top or tube top, and wear a green maxi dress for the tail. The wig might be the only prop you need to buy!


DIY Mermaid Man Costume

This content is imported from Instagram. You may be able to find the same content in another format, or you may be able to find more information, at their web site.

Let’s not forget about the iconic character in Spongebob, Mermaid Man. His costume is relatively easy to emulate with a few basic essentials you probably already have at home. For the star face mask and belt, you can use purple felt.


DIY Kids’ Mermaid Costume

More DIY Ideas

DIY Mermaid Costume

Sewing Rabbit

In this tutorial, The Sewing Rabbit shows us how to turn your little one into a mermaid. Your child (and everyone you see on Halloween) will be wowed by how you transform organza into an incredible tail. If you follow the directions, you should be able to finish in 90 minutes!


DIY Mermaid Costume for Toddlers

This content is imported from Instagram. You may be able to find the same content in another format, or you may be able to find more information, at their web site.

You can actually purchase mermaid swimsuit sets that come with mermaid tails that flow beautifully in water. For something more foot-friendly, opt for a mermaid dress paired with an ornate floral crown.


DIY Mermaid Costume for Babies

This content is imported from Instagram. You may be able to find the same content in another format, or you may be able to find more information, at their web site.

A ton of mermaid tail crochet tutorials live on YouTube — you just need a little patience and a lot of yarn. If you’re running low on time, Etsy has quite a few adorable mermaid sets that easily slip on your baby. As always, make sure the costume doesn’t include small parts that your baby can chew on.


DIY Mermaid Makeup

More Makeup Ideas

DIY Mermaid Costume

YouTuber/Valerie Pac

If you’re swimming in beauty products, you may consider copying this makeup design by YouTuber Valerie Pac. Follow along in this video to see her scaly, stunning look.


DIY Mermaid Face Paint

This content is imported from Instagram. You may be able to find the same content in another format, or you may be able to find more information, at their web site.

A good face paint job can elevate a costume tenfold (or make up for a lack of one). You will need a little patience and artistic skill, but the results will be worth it. Add face jewels or pearls for extra points.


DIY King Triton Budget Costume

This content is imported from Instagram. You may be able to find the same content in another format, or you may be able to find more information, at their web site.

In times that we don’t have the resources, we need to get creative. We love how this man used a broom and trash bag to recreate King Triton’s trident and beard. If you have a little more time, you can quickly purchase the merman’s props on Amazon.


DIY Scary Mermaid Costume

This content is imported from Instagram. You may be able to find the same content in another format, or you may be able to find more information, at their web site.

Not all mermaids are friendly. The fantasy creatures can be scary too, especially if you go a little daring on the makeup. Wear clothing and accessories of deeper green, blue, and purple shades.


DIY Mermaid Costume for Pets

This content is imported from Instagram. You may be able to find the same content in another format, or you may be able to find more information, at their web site.

Yep, even pets can join in on the mermaid fun — if they’re up for it! Beyond two-piece mermaid costume kits, you can dress your dog or cat in mermaid blankets, collars, and even life jackets. Just remember if your dog is feeling uncomfortable in the costume, don’t force him or her to stay in it.

This content is created and maintained by a third party, and imported onto this page to help users provide their email addresses. You may be able to find more information about this and similar content at piano.io

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