I have done a scalloped border with bias binding. The hardest part for me was marking the scallops without the ruler. If you have the ruler, that’s half the battle. With that being said, some people advise sewing the bias binding on before cutting the edge. Since I figured my own scallops I wanted to make sure that my scallops matched when the quilt was folded so I cut the bottom and one side and used that for the template for the other side and the top. There are several good tutorials on YouTube to watch before you do your scallops.