I didn't want to pay the price for the "perfect circles" when I had what I need in my desk drawer for years. Remember the compass we use that had the pencil in it to make arcs and circles. They still sell them at places like Office Depot. They're about $7-8.00. The one I have makes up to a 12" circle. You can make your own circle templates with this. I now keep mine in my template. you can also make scallops with this so easy. Also any size yo yo you want.