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How to make baby pants with a t-shirt

sew baby pants in used t-shirt

I realized that it’s been a while since my last sewing project. I started sewing years ago when my son was a baby. He has to wear the first clothes I saw, and honestly, sometimes he has to wear some strange outfit! Fortunately, he was too little to remember anything. Nine years later, I had time to improve my sewing skills. Our little girl deserves some custom made outfits, so I start to sew baby clothes again.

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Babies are growing so fast that the clothes don’t last very long, so I wanted to do something budget-friendly. I used one of my t-shirt that I don’t wear anymore and turns it into baby pants and a matching headband. Can you believe that each year in the USA people throws 15 million tons of clothes in land fields! So if you’re into making clothes yourself, upcycling is one of the options we have to reduce our textile consummation and contaminate less. Making baby clothes is one of my favorite thing to sew, it’s fun and quick to achieve.

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Materials you will need to make baby pants with a t-shirt

If you don’t have any used t-shirt to upcycle, you can use any garment made out of knit fabric or buy knit fabric by the yard (check these cute baby designs). In this case, overlay two layers of fabric to make your baby pants.

used t-shirt to sew baby pants

This is the shirt I upcycled, the fabric was in good condition except for some small holes on the bottom edge.

report baby pants pattern on t-shirt

Turn the t-shirt to have the wrong side out. Take baby pants and report the shape on the t-shirt. I place it that way because I didn’t want pants with small holes in it.

sew baby pants following the marks

Pin both sides of the shirt together and sew the pants following your drawing. Leave the bottom of the legs and the waistband unsewn. As you work with jersey I suggest you sew with zigzag stitches.

cut out the fabric to create the baby pants shape

Remove the pins and cut the pants out of the shirt. Leave about 1 inch (2cm) of extra fabric on the waist and on the bottom of the legs.

fold the bottom of the baby pants

I like to have the legs bottom finished with an elastic. That way even if the pants are a little too big it fits well and you don’t have to make several folds to see the baby’s feet.

pin the bottom of the baby pants

Make a fold with the legs bottom, pin and sew along the edge. Leave 1 inch unsewn and pass an elastic into the fold, then make a knot with the elastic ends and close the unsewn gap with a few stitches. Repeat for the other pants leg.

make the waist of the baby pants

Adjust the front of the waistband by cutting out the fabric, you just have to report the shape from the pants you used as pattern. Make a fold with the waistband, pin and sew. As for the legs, leave an unsewn gap to pass an elastic thought the fold, once you are done, sew both elastic ends together and close the gap with a few stitches. Turn the pant right side out and done!

Easy to sew DIY baby pants

And a pic of the matching headband. I forgot to take pics of the sewing steps, but I can make a tutorial if it’s something you are interested in, just leave me a comment. I was a very easy sewing project to make and as I used an old t-shirt it didn’t cost anything…sounds like the perfect combo, right?

Easy to sew DIY baby pants

Easy to sew DIY baby pants

Easy to sew DIY baby pants


You will find all the tutorials featured in the video on my “Best DIY” page.


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  1. patti
    * * * / * * *

    so cute! she needs that headband with a full head of hair! great little project.

    • amaryllis
      * * * / * * *

      Thanks Patti! The head and slip on her eyes quite often…so I will have to wait a little before she can wear it!

  2. Mamyca
    * * * / * * *

    Il reste encore du tissus pour lui coudre de jolis rubans qu’elle portera comme sa grande soeur !

    • amaryllis
      * * * / * * *

      Oui il y a encore quelques t-shirts a découper 😉

  3. Belinda
    * * * / * * *

    I would love to see a headband tutorial….what a clever upcycle

    • amaryllis
      * * * / * * *

      Thanks Belinda! I want to upcycle an other t-shirt into a baby dress, so I will add the headband tutorial to the list 🙂

  4. * * * / * * *

    Such a great idea, I’ve been wanting to get into sewing clothes myself. Great inspiration. Thanks!

    • amaryllis
      * * * / * * *

      Thanks! I wish I have more time to sew…it’s such a relaxing craft!

  5. Susan
    * * * / * * *

    When cutting out the pants do you add anything to the waste band for gathering

    • amaryllis
      * * * / * * *

      Hello Susan, I did add a seam allowance of 1 inch on the waist and the leg. So there is enough fabric to make a fold and to slide the rubber band in.

  6. Veronica Perez
    * * * / * * *

    I love these pants. Do you have a tutorial for the head band??