A polo shirt can be updated with this scalloped collar because the piqué frays minimally and holds its shape.
Step 1: Measure the circumference of the collar to figure out how to divide it up into evenly sized scallops. I decided to mark my collar every 2 inches because it is about 18 inches long.
Step 2: After measuring and marking draw the scallops in with pencil.
Step 3: Snip along the scalloped line.
Step 4: Top stitch the edge and wear with joy!