For Halloween my daughter asked to be a pink and rainbow unicorn Pegasus. I’m always willing to make them a costume. I was very excited to make such a unique Halloween costume, and I want to teach you how to make a rainbow unicorn costume with this sewing tutorial.

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How to Make a Rainbow Unicorn Costume // heatherhandmade.com

I love how kids can be so creative with their Halloween costumes. I was really excited to make such a unique costume, but I knew it would be important to make her vision happen.

How to Make a Rainbow Unicorn Costume // heatherhandmade.com

When she told me what she wanted to be, we first went to my fabric stash to see what I had. I’m determined to sew through my fabric stash, and I had this fabric waiting to make something for my girls. I didn’t have any other pink fabric so, luckily, my daughter was happy with this heart fabric.

She does look a little bit like a Dalmatian heart spotted unicorn, but I kind of like the bold look. It just makes it hard to see what she is at first glance.

How to Make a Rainbow Unicorn Costume // heatherhandmade.com

The pink fabric is a French terry and the mane and tail are all fleece. It’s a warm costume because we often have a cold Halloween day. She can even layer clothing underneath if she needs to. I’ve used this same sweatshirt sewing pattern for two other Halloween costumes!

How to Make a Rainbow Unicorn Costume // heatherhandmade.com

Her favorite part is the horn and the wings. It makes the whole costume come alive. She always wants to crawl around on her hands and knees when she’s wearing it!

How to Make a Rainbow Unicorn Costume // heatherhandmade.com

I had a lot of fun picking out the colors for the rainbow hair. My daughter was at school so I got to choose the colors I wanted which means they coordinate better than if she chose them.

How to Make a Rainbow Unicorn Costume // heatherhandmade.com

Supplies

How to Make a Rainbow Unicorn Costume // heatherhandmade.com

How to Make a Rainbow Unicorn Costume

Watch the video below and then read the tutorial below for extra details.


1. In this tutorial I use a three piece hood. I had two rows of hair for the mane. If you have a two piece hood you can eliminate one row of hair.

Cut out your pattern pieces.

How to Make a Rainbow Unicorn Costume // heatherhandmade.com

2. Cut our four rectangles of each color of fleece measuring 4 inches wide by 7 inches tall. Cut 1 inch hair slits into each piece but leave it connected on one side.

How to Make a Rainbow Unicorn Costume // heatherhandmade.com

How to Make a Rainbow Unicorn Costume // heatherhandmade.com

3. Layer two pieces of each color around the curve of the hood overlapping each color about halfway with another color. You should never have more than four layers of fleece at a time.

How to Make a Rainbow Unicorn Costume // heatherhandmade.com

4. Pin the center hood piece over the fleece mane and sew it together. Then sew the center hood piece to the other side.

How to Make a Rainbow Unicorn Costume // heatherhandmade.com

5. Finish the hood as recommended by the pattern. Then add the ears and the unicorn horn. Sew the hood onto the sweatshirt.

How to Make a Rainbow Unicorn Costume // heatherhandmade.com

6. Cut long rectangles for the tail measuring 4 inches wide by 18 inches tall.

How to Make a Rainbow Unicorn Costume // heatherhandmade.com

7. Cut 1 inch hair into the tail pieces but leave it connected on one side.

How to Make a Rainbow Unicorn Costume // heatherhandmade.com

8. Layer three colors onto three other colors and overlap them by half.

How to Make a Rainbow Unicorn Costume // heatherhandmade.com

9. Pin the tail onto the sweatshirt hem and sew. My pattern has a waistband so I sewed the tail into the waistband, but you can also just sew it onto the hem.

How to Make a Rainbow Unicorn Costume // heatherhandmade.com

10. Finish the sweatshirt. Add the Pegasus wings to the back of the sweatshirt.

How to Make a Rainbow Unicorn Costume // heatherhandmade.com

If you make a rainbow unicorn costume, I’d love to see! Please share it on social media with the hashtag #heatherhandmade and tag me!

How to Make a Rainbow Unicorn Costume // heatherhandmade.com

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Author: Heather Handmade

I'm a seamstress and mother. I sew, blog, thrift, upcycle, design fabric, and teach sewing classes. I'm also a self-proclaimed fabric fondler.

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