I like to use a used dryer sheet and I draw my circle on it. I lay the dryer sheet on the right side of my fabric and sew with a smaller stitch length all the way around the circle. I trim the edge with my pinking shears down to 1/4 inch seam allowance. I cut a slit in the center of the dryer sheet and turn the circle right side out. I press with the iron until the circle is perfect. The circle is now ready to appliqué down.