You can see by the photo above that you can create really small circles.
However if you were using stained glass, you would need to have near perfect circles. I was lucky enough to have a person visit my blog who gave me some very useful information:
"If the glass is transparent (or semi-transparent), you can flip the glass over and place it on a piece of very short pile carpet) press on the "cut line" and you will see the glass "run" as you press. Continue all the way around and your circle will be much smoother when you flip it back over and score your "run off" lines - per the instructions. Let me know if this works"
Thanks to Alan from http://www.stainedglassconnectionfl.com/
I tried this technique and it works. My circles now have a smoother finish and do not require any grinding. Making circles is so much easier now!
Kathryn, Lazy Daisy xx