I finished the doily from the Craftree tat-along. I was able to do it continuously into round 9. Halfway through round 9 I ran out of thread, so I had one time I had to cut and tie. Luckily round 9 is the last one and it only required a ball thread so I worked off the spool. It did not take long to do that round. I think it looks pretty good. It is about 7 inches across (17.78cm). I don't know how big it would be in size 20.