DIY Werewolf Dog Costume

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Learn how to make a DIY werewolf dog costume by upcycling a button up shirt and a piece of denim. It is mostly cutting and one row of sewing.

I’ve loved thinking up costumes for our new puppy. We take him everywhere with us, so if we do a little bit of trick-or-treating this year he is sure to come.

My son decided he should be a werewolf because he kind of already looks like a “wolf”. I realized how easy it would be to cut up a button up shirt and some jeans to make a werewolf dog costume. This costume is so simple and you could hot glue the one part I sew if you want.

diy werewolf dog costume

The great thing about this costume is that it works really well with a leash. My dog wears a harness so I just cut a hole in the back of the shirt for the leash to go through. You could do the same for a collar and leash if that is what your dog wears.

diy werewolf dog costume

Do you love dog sewing projects and costumes? Try one of these:

diy werewolf dog costume

DIY Werewolf Dog Costume


  • Child sized button up shirt – the size really depends on your dog – my dog is about 40 pounds, and I used a boy’s size 4 button up shirt. When the top two buttons are buttoned the shirt fit around my dog’s lower neck/upper shoulders.
  • A piece of jeans or denim. I always cut my kids pants into shorts and have a bunch of pants pieces hanging around.
  • Sewing tools
  • Sewing machine (or hot glue)
diy werewolf dog costume supplies

Cut the coolar off of the button up shirt.

cut off the collar

Cut the lower front of the button up shirt off. I cut up the side seam, across the front under the pockets, and down the other side seam. Make sure you don’t cut through a button or buttonhole.

cut off the lower front

Cut the sleeves off of the button up shirt.

cut off the sleeves

This is the shirt or top part of the costume. When opened it’s like a big “T” with armholes.

open the front buttons

Try the shirt on your dog to determine where the harness or collar will sit. I cut a hole where the leash will connect to the harness. You can skip this if the shirt will fit different and not cover the collar, but it’s nice having an extra spot to hold the costume in place.

cut hole in center back for collar or harness

Cut your denim into a rectangle that is as wide as the shirt and half the height.

cut rectangle piece of denim

Layer the bottom back of the shirt over the denim. Line up the sides and make sure the shirt covers the top of the denim piece. Pin it in place.

Sew across the stitches of the hemline to combine the two pieces. You can also hot glue these pieces together instead.

pin the back of shir to denim and sew

Cut a couple of holes in the shirt and denim. Cut a ragged hem into the denim. You want the clothes to look ragged and ripped like a human turned into a wolf and walked through the forest.

cut holes and ragged edges

You finished! To wear the costume I place the hole over the spot where the leash connects to his harness and then I button the two buttons around the front at the top of his chest.

diy werewolf dog 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!

diy werewolf dog costume

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