Simple Technique to Upsize Clothes

5 Materials
30 Minutes

So often it happens that I find a dress at the thrift shop that I simply can’t ignore. But the unfortunate reality is, it’s much too small for me. The good news is there is a simple way to upsize a dress that won’t close, and I am going to show you how to do that today. So follow along as I show you my thrift flip technique for how to upsize a dress.

Tools and materials:

  • Dress
  • Matching fabric
  • Scissors
  • Pins
  • Sewing machine
How to upsize clothes

Upsize a dress


To begin, I cut the side seams, making sure I cut an equal amount on both sides of the dress.

How to upsize a dress

Next, I cut a triangle of fabric from an old t-shirt. I used the sleeves of the t-shirt since the edge is already finished, which saved me a step. The length of the triangle was equal to the length of the cut in the dress, and the width should be 10-15 centimeters (4-6 inches), depending on how much extra fabric is needed to make the dress fit properly. 

Thrift flip

Pin and sew

I turned my dress inside out. Then I pinned the triangles into the slits I had cut on the sides of the dress, making sure the top edges were even with the armholes. Then I sewed them in place. 

DIY upsized dress

Zigzag stitch

To prevent fraying, I finished all the raw edges with a zigzag stitch. If you have a serger, you can serge the edges instead.

The dress fits perfectly!

This technique can be used for all different types of clothing, not just dresses. Let me know what you think of my idea for how to upsize clothes!

Suggested materials:

  • Dress
  • Matching fabric
  • Scissors
See all materials

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