When I was a pack leader & mine were in scouts, they had the patches sewn onto the back of their red vests. Actually, I made a drawing for a center circle patch with an Indian logo, pack # & such on it. Then we took the drawing to a place that made patches & had the patches made for the whole Pack. As the boys earned the little badges, they were sewn around the bigger center circle. The patches that are slightly curved on the bottom will make a circle when laid out & this is the size center patch I had made.