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Costume Craft Tutorial DIY Halloween

DIY Mira Costume from KPop Demon Hunters: “How It’s Done” Outfit Tutorial

If you’re looking for a show-stopping Halloween costume inspired by Kpop Demon Hunters, Mira’s bold and confident look from the opening number “How It’s Done” is the perfect choice. This outfit combines bright colors, a stylish cropped tee, and Mira’s signature pink hair — making it a fun DIY project for fans of the hit movie and anyone who loves K-pop style.

In this tutorial, we’ll break down how to make Mira’s costume step-by-step, including her cropped t-shirt design, yellow skirt, pink hair look, and accessories that complete her stage-ready outfit.

Planning a group costume? Pair Mira’s look with my DIY Rumi costume from Kpop Demon Hunters for the ultimate K-pop duo! Both outfits are inspired by the “How It’s Done” performance and look amazing together — perfect for siblings or best friends who love the movie.

Table of Contents

  1. Making Mira’s Cropped T-Shirt Design
  2. Sewing an Easy DIY Yellow Skirt for a Mira Costume
  3. Creating Mira’s Pink Hair Look
  4. Embellishing Mira’s Black Choker Necklace
  5. Finishing Touches: Accessories and Attitude

Making Mira’s Cropped T-Shirt Design

Image from “KPop Demon Hunters”

Mira’s top in “How It’s Done” is a playful twist on classic K-pop fashion — sporty, cropped, and full of attitude.

Start with a plain black t-shirt. Mark your desired crop length with chalk (around the waistline or slightly above) and cut evenly with a rotary cutter, quilter’s ruler and cutting mat. Fabric scissors work too.

Flip the t-shirt inside out and pin a 1/2″ hem. Using a sewing machine with black thread in a zig zag stitch, sew the hem. This will help prevent the t-shirt from fraying along the bottom.

I found a great Etsy account with Mira’s T-Shirt Design (along with Rumi’s jacket badge designs!). I printed it on regular paper first to figure out the correct size, then printed the final design on Iron-On Transfer Paper for Dark Fabric.

The t-shirt design came in a couple different background options, but I went with the black one so that the white elements of the graphic design would stand out.

Applying the Iron-On Design:

  1. Cut around the image carefully with fabric scissors to get rid of most of the negative space on the print.
  2. Heat iron on the hottest setting, without any steam. *make sure there is no water in your iron before starting*
  3. Place your t-shirt on a SOLID surface and use your iron to smooth out creases on the t-shirt (Do not use an ironing board, as it will be too soft)
  4. Peel your design from the backing paper. You can use tweezers to help you peel, as it can be a little difficult to get it started.
  5. Place your design on the t-shirt, facing upwards.
  6. Cover your design with the teflon paper included in the package
  7. Iron the design onto the t-shirt using heavy and even pressure, following the package instructions. For this t-shirt design and size, I ironed it for 2 minutes on the highest heat setting.
  8. Remove teflon sheet and voila! Your design is done!

We live in a colder climate, so a simple pink or nude leotard underneath the cropped t-shirt will keep trick-or-treaters warm!

Materials Used:

Girls Black T-ShirtAmazon CanadaAmazon US
Rotary CutterAmazon CanadaAmazon US
Quilter’s Ruler Amazon CanadaAmazon US
Cutting MatAmazon CanadaAmazon US
Sewing MachineAmazon CanadaAmazon US
Black Sewing ThreadAmazon CanadaAmazon US
Glass Head Sewing PinsAmazon CanadaAmazon US
Iron on Transfer Paper for Dark FabricAmazon CanadaAmazon US
IronAmazon CanadaAmazon US
Mira T-Shirt ImagesEtsy
Pink or Nude LeotardAmazon CanadaAmazon US

Sewing an Easy DIY Yellow Skirt for a Mira Costume

Mira’s bright yellow skirt adds the perfect pop of color to her outfit. The great news? It’s super easy to make, even for beginners!

I chose a sunny yellow polar fleece fabric to make it cozy for our cooler weather, but you could use a lightweight cotton for warmer temps. The great thing about polar fleece, is you can leave an edge unhemmed and it will not fray.

I followed a free Simple A-line Skirt Pattern from We All Sew. Essentially, you cut a trapezoid shape based on the waist measurements and desired length.

Stitch up the two sides with either a serger sewing machine or a regular sewing machine with a zig-zag stitch. Fold over the top edge 1-1/4″ and make a casing for the 1″ elastic waistband, leaving a small opening to fish the elastic through. Attach a safety pin to one end of the elastic and use that to help you feed the elastic through the waistband casing. Pin elastic in place and check to make sure the skirt fits the waist snuggly. Once you have the right length of elastic, sew the two ends together and hand stitch the casing opening closed.

The great thing about polar fleece, is you can leave an edge unhemmed and it will not fray. Try on the skirt, determine the final length desired and then cut off any excess using a rotary cutter, quilter’s ruler and cutting mat.

To complete the kpop star look for Mira’s skirt, add a clip on silver chain and pin on a pink Korean norigae or Chinese Knot.

Materials Used:

Yellow Polar Fleece FabricAmazon CanadaAmazon US
1″ Skirt ElasticAmazon CanadaAmazon US
Rotary CutterAmazon CanadaAmazon US
Cutting MatAmazon CanadaAmazon US
Serger Sewing MachineAmazon CanadaAmazon US
Yellow Serger ThreadAmazon CanadaAmazon US
Regular Sewing MachineAmazon CanadaAmazon US
Yellow Sewing ThreadAmazon CanadaAmazon US
Skirt ChainAmazon CanadaAmazon US
Pink Korean Norigae or Chinese KnotAmazon CanadaAmazon US

Creating Mira’s Pink Hair Look

One of Mira’s most recognizable features is her pink hair. Instead of committing to permanent dye, try temporary hair wax. Choose a vibrant pink shade and apply it evenly through your hair following the product instructions. We chose just to do the front part of the hair and the pig tails, but you could apply it to your whole head as well. It washed out easily with regular shampoo.

Style your hair with two half pigtails and front bang pieces to match Mira’s fun and energetic vibe. You can add more hair to the pigtail using pink hair extensions.

Materials Used:

Pink Hair WaxAmazon CanadaAmazon US
Hair Braiding Kit with Clear ElasticsAmazon CanadaAmazon US
Pink Braiding Hair ExtensionsAmazon CanadaAmazon US

Embellishing Mira’s Black Choker Necklace

To add to Mira’s rockstar look, add a custom black choker necklace. Start with a simple black velvet choker or faux leather choker — you can find these at most accessory stores or online.

To give it that signature Mira sparkle, use a large faux gem or rhinestone in clear or iridescent white. Position the gem in the center of the choker and secure it with hot glue, pressing gently until it sets.

The result is a simple yet eye-catching piece that ties the whole costume together.

Materials Used:

Black Choker NecklaceAmazon CanadaAmazon US
Gem EmbellishmentAmazon CanadaAmazon US
Hot Glue GunAmazon CanadaAmazon US
Hot Glue SticksAmazon CanadaAmazon US

Finishing Touches: Accessories and Attitude

Image from “KPop Demon Hunters”

No Mira costume is complete without her standout accessories! Think spikey earrings, fingerless gloves, black leggings, boots or sneakers, and bold makeup with a pop of glitter from face gems.

Finish the look with confidence — because Mira’s true power comes from her bold personality and stage-ready energy.

Materials Used:

EarringsAmazon CanadaAmazon US
Fingerless GlovesAmazon CanadaAmazon US
Black LeggingsAmazon CanadaAmazon US
BootsAmazon CanadaAmazon US
Face GemsAmazon CanadaAmazon US
MascaraAmazon CanadaAmazon US
EyeshadowAmazon CanadaAmazon US

Creating your own Mira costume from Kpop Demon Hunters is a creative, budget-friendly way to stand out this Halloween. With just a few simple materials and a little imagination, you’ll be ready to rock the stage — just like Mira in “How It’s Done”!

If you loved making Mira’s outfit, be sure to check out my DIY Rumi costume tutorial from Kpop Demon Hunters! Rumi’s bright yellow jacket, custom patches, and purple braids make her another fan-favorite. It’s the perfect companion costume if you’re planning a KPop group or best-friend Halloween look.