DIY Frankenstein Costume

heather handmade sewing

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Learn how to make an easy DIY Frankenstein costume for Halloween with a free hat sewing pattern that looks like the monster’s head!

When my kids and I talked about all the costumes we’ve done over the years, we realized we’ve never done Frankenstein’s monster (or just Frankenstein as most people call it). It’s such a classic character for Halloween, and it’s actually really easy to put together.

The clothing can all be found in your child’s closet, and the head, which is the most iconic part of the costume, can made with this free hat sewing pattern. This is a fun and easy DIY costume to put together.

diy frankenstein costume

This hat is a simple circle hat shape, and it fits children ages 5-10 years old depending on the size of the child’s head. This hat would be great if you live in a place that’s cold.

Pair it with clothing that is green and black for an easy and great costume. You can even add green gloves to make the hands look like Frankenstein’s hands.

DIY Frankenstein Costume

What is a PDF sewing pattern?

A PDF pattern is a sewing pattern designed on the computer and organized so that it can be printed on several letter or A4 size pieces of paper.

I love using PDF sewing patterns because if the pattern gets ruined or if my children or I changed sizes, I can always print it again. It’ll never be destroyed since I have a digital version!

How do you use a PDF sewing pattern?

Open the PDF on a computer and click print. When printing make sure that the scaling is set to 100% or no scaling so that the pattern prints at the correct size. Learn how to use PDF sewing patterns.

DIY Frankenstein Costume

Do you love to sew? Try one of these fun sewing projects:

DIY Frankenstein Costume

DIY Frankenstein Costume


For the Hat

  • 1/4 yard green fleece
  • 1/4 yard black fleece
  • Scraps of gray felt or fleece
  • Sewing tools
  • Sewing machine
  • Free Frankenstein hat sewing pattern – get it at the end of the post

For the Costume

  • Green plaid shirt
  • Green gloves
  • Black pants
  • Black shoes
DIY Frankenstein Costume supplies

Cut out two hat sides from green fleece fabric. Cut out a top circle from both green fleece and from black fleece. Cut out one hair side from black fleece.

From the gray felt cut out four circles and two rectangles.

cut out all the hat pieces

Pin and sew the black side hair to one of the green sides.

sew hair onto one side

Match up the short sides of each side pieces with the right sides together. Sew each side together.

sew short ends right sides together

Pin the circle hat pieces to the side pieces with right sides together and sew. The black piece should be paired with the side piece with hair and the green piece should be paired with the gree side piece.

sew circles onto sides right sides together

Place the hats one inside the other with right sides together. Sew around the edges and leave a 3 inch hole. Backstitch when you start and when you stop.

sew hats together right sides together

Turn the hat right side out through the hole. Push the lining inside the hat.

turn right side out and push lining inside

Topstitch around the edge of the hat to keep the lining inside the hat and to close the hole.

topstitch hat and close hole

Place two felt circles on top of each other, and zigzag around the edges. Do the same to the other two circles.

stitch bolt layers together

Roll up both of the rectangles into tubes. Hand stitch the tube in place.

roll rectangle into tube and stitch

Place the ends of the bolts onto the tubes and hand stitch in place.

stitch bolt end onto tube

Hand stitch the bolts onto each side of the hat.

stitch bolts onto hat sides

Get the Free Sewing Pattern here!

DIY Frankenstein Costume

If you make something using this sewing project, I’d love to see! Please share it on social media with the hashtag #heatherhandmade and tag me!

heather sewing

I believe small sewing moments can create great joy. Find your own “right” way to sew. -Heather

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I don’t understand #2 in the pattern. Is it a big square?