Learn how to sew a baby shark song costume.
You guys. YOU GUYS!
I am SO dang excited about our Halloween costumes this year!
But first, a note: Photos of the three of us are by Maria Vavilova Photography and edited by me. Others I took myself. Thanks, Maria!
And one more quick thing: if you’re looking for another baby Halloween costume idea, check out Cricket’s DIY Sophie the Giraffe Halloween costume from last year!
You know the baby shark song, right? “Baby shark, doo doo doo, doo doo, doo doo!”
Yeah, yeah, it’s stuck in your head now. I’m sorry.
Now that we’ve got that all cleared up, I MADE A BABY SHARK COSTUME FOR ALL THREE OF US!
And Pippa’s a shark, too, of course.
Where to Buy a Baby Shark Song Costume for the Family Instead of DIY?
I designed a collection of shirts, sweatshirts, and hoodies for the whole family. They don’t have shark teeth, unfortunately, but it would be easy enough to make a cute shark hat to go along with them. You could also just use fabric glue to glue felt teeth inside the hood!
If you want to go halfway homemade, you can buy shark hoodies and then add iron-on letters. Here’s where to find everything:
- Baby shark song shirts, sweatshirts, and onesies
- Shark hoodie for kids – Amazon
- Adult shark hoodie – Amazon
- Iron-on letters – Amazon
And since you’re a shark person, you might love this mommy and me collection I created, too!
DIY Baby Shark Costume
Well, #sorrynotsorry for all the photos you’re about to have to scroll past to learn how to sew a shark costume. I couldn’t pick. They were all too stinkin’ cute!
The great thing about this family Halloween costume idea is that since it’s a hoodie costume, it’s warm and cozy. Your little ones — and you — won’t be freezing your fins off while you’re out trick-or-treating!
DIY Baby Shark Song Costume
These are the exact sweat suits I used — both the baby and adult versions. I’ve also linked to the exact supplies I used (like the fabric spray paint) or the closest available online product for ones I couldn’t find online. The list contains affiliate links, so I could make a commission, but it won’t cost you anything extra.
- Grey hooded sweatshirt
- Matching grey sweatpants
- Tulip ColorShot Instant Fabric Color in white
- White felt
- I used 26″ x 4″ for the 18-month hoodie.
- I used 33″ x 4″ for the adult hoodies.
- Red jersey fabric
- White all-purpose thread
- Grey all-purpose thread
- For the letters
- Fabric scissors
- Sewing measuring tape
- Painter’s tape
- White acrylic paint
- Small paintbrush
* You can use whatever black iron-on letters you like, but you’ll need to get extra to have enough of the letter “O.” To give you an idea for sizing, my letters for the adult hoodie are 1.5″ and 1″ tall and for the toddler size are 1″ and 0.5″ tall!
Instructions: How to Make a DIY Baby Shark Costume
I modified this great DIY shark costume tutorial to do the teeth. Check it out in case you want to skip the red fabric!
1. Measure the hood of a hoodie while folded in half, and then double that measurement. Add two inches to the length.
Cut two strips that length by two inches wide.
2. Add a strip of painter’s tape along the length of one piece of felt to create a straight line.
Use a measuring tape to add dots with the market to the painter’s tape to create evenly-spaced guides to sew the teeth. I made a dot every one inch.
3. Lay the taped strip of felt on top of the other piece, and use a sewing machine with white thread and a straight stitch to sew a zigzag. You’ll sew up to the edge of the painter’s tape at every dot.
Cut out the extra triangles from under the zigzags after you’ve sewn the full row of teeth.
4. Fold the red fabric in half, and mark the long edge at the same hood length you calculated in Step 1. Cut a triangle with the folded side being the long edge.
Iron the red fabric to press down the fold.
5. Sandwich the folded edge of the red fabric between the hood and the teeth, and pin the layers in place together.
Use grey thread and a zigzag stitch to sew the layers together.
6. Cut away the extra felt from the teeth inside the seam, like at the top of the above image.
7. If your hoodie has a zipper, tape over it with painter’s tape.
Cut a half-over tummy shape out of adhesive vinyl for a baby- or kid-sized hoodie, and stick it onto the hoodie. Press it down firmly to keep any paint from bleeding under.
For an adult size, you can cut the shape out of butcher paper, wrapping paper, or something similar. Stick painter’s tape around the inside edges, and trim the tape into a smooth oval shape. Stick the tape onto the hoodie, and press it down firmly.
8. Put a piece of cardboard or heavy paper inside the torso of the hoodie to keep any paint from bleeding through.
Spray the tummy white with several thin, even coats.
Tip: You can’t tell from the above photo, but I covered the hood and sleeves with paper to protect them from any spray.
Tip: Let it dry at least overnight before proceeding to Step 9. I got impatient and tried to iron the letters on as soon as the surface felt dry, and I now have a white iron. Don’t tell Andrei… 😉
9. Cut out the following words from black HTV in your favorite font. I used Cricut Sans for this one.
- BABY SHARK DOO DOO DOO
- MOMMY SHARK DOO DOO DOO
- DADDY SHARK DOO DOO DOO
You want the DOO DOO DOO to be around half the size of the other words, and the baby or kid version of the phrase will be smaller than the adult version so that the letters fit on the chest.
Iron them down with a lot of pressure, pressing until you can see the texture of the fabric underneath the letters.
10. Finally, cut eyes out of the HTV as well. I did a big circle on either side of the hood. I cut little circles out from the bigger circles to leave an empty space.
After you iron on the eyes, you can paint the insides of the empty circles with white to give the eyes a cute (instead of scary!), sparkly effect.