DIY Halloween || Mermaid + Merman Couples Costume

This super easy and fun couples costume idea is perfect for Halloween and all of your other costume parties. Easy to make and super stylish, this DIY costume is sure to make you stand out in the crowd!

Mermaid and Merman couples costume

Let the Halloweening continue!  I am out in Seguin, Texas this week shooting on location– doing a very different kind of costuming than what we have for you here today!  While most of our costumes have always been kid-centric because they are just so much fun to dress up.  Today our editorial manager, Britt, obliged to bring this Mermaid and Merman of Atlantis shoot to life.  It’s super easy to make and you can do it on the cheap in very little time.  What are you guys going to be?!  Aaron and I are dressing up this year for the first time since our Rachel Zoe and Brad Goreski costume circa 2011 and I’m pretty excited! (See here for our other Halloween Costumes.)

A couple wearing a mermaid and merman costume The mermaid costume

What you’ll need to Make The Mermaid and Merman Couple’s Costumes

What You’ll Need For the Mermaid

  • 1 piece (8.3 in x 11.7 in) metallic pink felt
  • 1 piece (8.3 in x 11.7 in) metallic gold felt
  • 1 piece (8.3 in x 11.7 in) light pink felt
  • iridescent pipe cleaners
  • scissors
  • pencil
  • hot glue gun and glue sticks
  • pins
  • Tulle Sleeveless dress from Zara
  • Nude Ribbed Halter Crop Top from Forever 21
  • metallic skirt (or 1 yard metallic fabric and safety pin)

What You’ll Need For the Mermaid Necklace and Anklet:

  • 1/2 yard gold trim
  • 1/2 yard gold string or cord
  • 3 scallop sea shells
  • 4 large, flat silver sequins
  • 1/4 yard gold sequin trim
  • hot glue gun and glue sticks

What You’ll Need For the Merman:

  • 2 yards gold metallic fabric
  • 1 yard iridescent fabric
  • 2 yards gold tulle
  • 3/4 yard gold trim
  • 1/4 yard gold string or thread
  • 2 large scallop sea shells (Hobby Lobby)
  • 2 cut spire sea shells  (Hobby Lobby)
  • hot glue gun and glue sticks
  • 3 safety pins

What You’ll Need For the Trident:

  • 1 3-pronged trident from Amazon
  • copper spray paint
  • 1/2 yard gold sequin trim
  • 7 large, flat silver sequins
  • 2 small scallop sea shells (Hobby Lobby)
  • 1 cut spire sea shells  (Hobby Lobby)
  • iridescent pipe cleaners
  • hot glue gun and glue sticks

A couple dressed in a Halloween costume

How to Make the Mermaid and Merman Couples Costume

Begin by drawing two scallop sea shells on the back of the felt about the size of your hand. Cut them out and used a glue gun to wrap the pipe cleaner along the outside edges. Place the metallic felt shells onto regular pieces of felt and glue them along the outside edges again, in order to have a softer fabric to attach to the tank. Glue gold felt onto the sea shells and then pin the final shells on to the shirt. I used a glue gun to glue the edges to the tank.

How to make the shells for the mermaid costume The mermaid shell necklace A glue gun and shells to make the necklace

For the necklace, use thin gold cord and gold string to attach sea shells with a glue gun to hang from the necklace.

For the merman cape, tie the gold tulle and half of the iridescent  fabric in 2 knots on the end. Then use the ribbon to tie around one of the knots.  Tie the gold string used on the necklace onto the other knot. Using a glue gun, attach shells to the knots and the end of the ribbon. Use the gold string to connect the shells to the other knot to hold up the cape.

For the bottom half, fold the gold fabric and the rest of the iridescent fabric in half and drape it on your costume partner, using a safety pin to connect it.

Spray paint your trident to the color of your choice. Using a glue gun, attach the shells to the fork. You can drape fork in sequin string from anklet as well.

A couple sitting on steps wearing a Mermaid and Merman costume

DIY Couples Halloween Costume

I love this couples costume, it makes such a great change from the usual costumes that you can buy straight off the rack. Halloween doesn’t always have to be cheesy – I love how stylish and elegant these are! They’re also super comfy and easy to wear, so you can party into the early hours!

Easy Homemade Halloween Costume Idea

The best bit about these costumes is that there’s no sewing involved, and you can easily source all the bits from local stores, or my favorite, buy everything on line! It doesn’t take much time to put everything together, and be sure to get your merman to help out!

No Effort Couples Costume!

This is a great costume idea to have in your back pocket for last minute events. I love that the look really classy but they really don’t take much effort to put together.

The Merman costume

Happy Halloween!

Final photos taken by Katie Jameson at Laguna Gloria

Crafting and Process photos by Britt Towns

Be sure to check out these other fun Halloween costume ideas!

Miraculous Ladybug Costume DIY 

The Easiest DIY Halloween Costume for Friends: A Rainbow and The Sun

DIY Toddler Costume || The Mini Yogi

DIY Halloween || Paw Patrol Skye Costume

If you have made this couples costume, I’d love to hear from you – be sure to drop a comment below and let me know what you think!

Mermaid and Merman Couples Halloween Costume

A fun and stylish couples costume
Active Time1 hr 30 mins
Total Time1 hr 30 mins
Keyword: couples halloween costume, DIY mermaid costume, mermaid costume
Yield: 2 costumes
Author: Jen Pinkston

Materials

What You'll Need For the Mermaid:

  • 1 piece 8.3 in x 11.7 in metallic pink felt
  • 1 piece 8.3 in x 11.7 in metallic gold felt
  • 1 piece 8.3 in x 11.7 in light pink felt
  • iridescent pipe cleaners
  • scissors
  • pencil
  • hot glue gun and glue sticks
  • pins
  • Tulle Sleeveless dress from Zara
  • Nude Ribbed Halter Crop Top from Forever 21
  • metallic skirt or 1 yard metallic fabric and safety pin

What You'll Need For the Mermaid Necklace and Anklet:

  • 1/2 yard gold trim
  • 1/2 yard gold string or cord
  • 3 scallop sea shells
  • 4 large flat silver sequins
  • 1/4 yard gold sequin trim
  • hot glue gun and glue sticks

What You'll Need For the Merman:

  • 2 yards gold metallic fabric
  • 1 yard iridescent fabric
  • 2 yards gold tulle
  • 3/4 yard gold trim
  • 1/4 yard gold string or thread
  • 2 large scallop sea shells Hobby Lobby
  • 2 cut spire sea shells   Hobby Lobby
  • hot glue gun and glue sticks
  • 3 safety pins

What You'll Need For the Trident:

  • 1 3 pronged trident from Amazon
  • copper spray paint
  • 1/2 yard gold sequin trim
  • 7 large flat silver sequins
  • 2 small scallop sea shells Hobby Lobby
  • 1 cut spire sea shells   Hobby Lobby
  • iridescent pipe cleaners
  • hot glue gun and glue sticks

Instructions

  • Begin by drawing two scallop sea shells on the back of the felt about the size of your hand. Cut them out and used a glue gun to wrap the pipe cleaner along the outside edges. Place the metallic felt shells onto regular pieces of felt and glue them along the outside edges again, in order to have a softer fabric to attach to the tank. Glue gold felt onto the sea shells and then pin the final shells on to the shirt. I used a glue gun to glue the edges to the tank.

For the necklace

  • Use thin gold cord and gold string to attach sea shells with a glue gun to hang from the necklace.

For the merman cape

  • Tie the gold tulle and half of the iridescent  fabric in 2 knots on the end. Then use the ribbon to tie around one of the knots.  Tie the gold string used on the necklace onto the other knot. Using a glue gun, attach shells to the knots and the end of the ribbon. Use the gold string to connect the shells to the other knot to hold up the cape.

For the bottom half

  • Fold the gold fabric and the rest of the iridescent fabric in half and drape it on your costume partner, using a safety pin to connect it.

Trident

  • Spray paint your trident to the color of your choice. Using a glue gun, attach the shells to the fork. You can drape fork in sequin string from anklet as well.

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  1. These costumes look awesome. I am still trying to figure out what I wanna be for Halloweeen, but I know is it’ll be a DIY.

    Xx, Fatima
    http://www.fatimasabri.com