I finished a doily, done in size 20 thread - and it it worked out about 19 inches across. When I first got the pattern, I thought it would be an "easy and quick" doily (i.e. lots of open spaces!). Then....I looked a little closer. It is all treble crochets, which always take me longer to make, and the pattern was more complicated than I thought. It turned out very nice though, and the ecru color makes it a classic!