![](https://cdn.shopify.com/s/files/1/2574/2560/files/UW1.png?v=1631550698)
Step 1: Button the jacket and lay it flat on a table face down with the collar up and arms positioned upward.
Use your hands to gently extend and flatten out excess fabric.
![](https://cdn.shopify.com/s/files/1/2574/2560/files/UW2.png?v=1631550719)
Step 2: Starting from the jacket's left edge, measure across at the midway point just below the first button.