Kath of Material Obsession has come up with this little trick. So have a seat at the sewing circle pals!
*1* Determine the diameter of your circle, draw it onto posterboard and cut it out. Then cut your fabric larger than the circle by about 1/2 an inch all the way around. Good news, the fabric circle doesn't have to be cut perfectly. BUT the poster circle does.
*2* Lay down a modest length of foil, then your fabric circle right side down, then your poster circle centered in the middle.
*3* Fold the foil towards the center of the circle all the way around, letting the fabric fold in tightly with it. Smooth the edges of the circle with your fingers to get out any bumps.
*4* Now press the the foil down all along the outer edges with your iron on a med-high setting.
*5* Turnover and repeat until you've gone all the way around.
*6* The foil edges will be hot, so fan yourself from the excitement and say 'super circles are simple' six times.
*7* Now in happy jiffy-pop mode, peel back the foil and remove (you could use the same foil once or twice more).
*8* Gently pull out the poster circle from the newly creased fabric circle.
*9* Now turn it over and just look at it and feel happy!
Now you can machine stitch, hand stitch, or applique your circles onto whatever you please!! This also would work well for other shapes, ovals, leaves, flowers, etc
Found at Anna Maria Horner.