![](https://cdn.shopify.com/s/files/1/2574/2560/files/S1.png?v=1631288910)
Step 1: Button the jacket and lay it flat on a table face down with the collar down and arms positioned downward. Use your hands to gently extend and flatten out excess fabric.
![](https://cdn.shopify.com/s/files/1/2574/2560/files/S2.png?v=1631288977)
Step 2: Begin on the left side, where the top of the armhole seam meets the shoulder fold, and measure across.