A guild member demonstrated how she does circles and I will do them like this from now on...she uses HEAVY DUTY aluminum foil, places the fabric circle cut bigger than plastic circle template...creases foil all around circle and then places a very hot iron on it for about 10 seconds...use heat proof plastic or xray film (shes uses this all the time). Don't worry if the plastic circle crinkles alittle bit, it can be used again...extreme heat must set edges because they don't loose the edge....so easy and can do so many at a time...