Connect the two lines together at the top and the bottom to make a small vertical rectangle.
This process will help secure and lock the stitch in place.
Topstitch around the buttonhole, then snip off the excess fabric on the back.

Image Credit: Trefa Craft via YouTube
Method #3
Lastly, if you want a smoother and better finish at the back of the buttonhole.
Place the fusible interfacing fabric at the back of the buttonhole and press it in place.
*Thanks toTrefa Craftvia YouTube for all images used here.

3 Ways To Make Buttonholes Neatly & Quickly
