Easy T-shirt modification for Kids

I recently started sewing for my son. I did sew a few things before he was born but after that, I could never find the time to make him (or myself) anything. Now my son is two years old, and I'm able to sew when he naps or I can throw him in daddy's arms and lock myself up for a little sewing before he starts knocking at my door, crying because he wants his mommy. That's the sweet mama life right there.

You don't have to be a mom to know that there is far more clothing styles for girls than for boys and with this online shopping craze, I found some gorgeous knit fabrics I wanted to get my hands on, and make something for my little prince. I fell in love with this t-shirt pattern so let's get started.

Here's what you need:

  • A T-shirt pattern (If you don't know how to draft one yourself) I used the day camp set by Peek-a-boo patterns.

  • Pattern paper

  • The usual: rulers, pins, the fabric, scissors you know the drill.

The first thing I did was trace the original pattern. As you can see in the picture, I cut open a paper bag and started tracing the pattern.

In order to make the diagonal cut, we need to ave the full front piece. Meaning that you will have to trace the front pattern twice, and tape it together down the center line or just draw the first half, flip the patter and draw the other half.


On this new patter piece, which is the full front you will draw a diagonal line starting from under the arm hole all the way to the corner on the opposite side. You will cut through this line and tape each piece on another a piece of paper, so you can add 1/2 inch seam allowance on both pieces. If you feel comfortable enough, you can just do just 1/4 inch seam allowance.




Nothing changes for the back piece.

The only alteration we are making is on the front. The font piece alteration is called color blocking and it gives you room to play with design. Now, with right sides of the fabric together, sew the diagonal pieces to form the front part of the shirt an if you have a serger, go ahead and serge it and give it a top stitch so that it lays flat. I used a stretch stitch and loosened the tension so the fabric wouldn't pucker or get wavy along the seam.




Now you need to follow the pattern instructions to construct the t-shirt, although essentially all t-shirts are constructed the same. Join front and back pieces at the shoulder seams, remembering to place right sides together and sew. I like to Fold the sleeves in half and mark with a pin the highest part of the sleeve and align it with the center top portion of the armhole and now you are ready to sew the t-shirt closed starting from the sleeves all the way down to the sides.



For the hem, I used a coverstitch, but you could use a double needle on your regular sewing machine or use a zig zag stitch and you are done! If you have never used a double needle before, I suggest you practice on a similar fabric before you try hemming the shirt because Lord knows seam ripping can be challenging! Remember to hem the sleeves too and you are done!!!



you can do many color block variations with this pattern. Don't just make this one diagonal cut, you can make horizontal cuts and have different stripes of color. Let your imagination go wild and play with the variations.



Disclaimer: I did not focus to much on the construction of the t-shirt, because this post is focused on changing the design of the front piece. Even though I gave you a general idea, you need to follow you pattern instructions.


I hope you have enjoyed this tutorial! Share with your creative friends.


Remember you can follow me on Instagram and Facebook




© 2020 Karla Menendez