Don't know if I've discovered something everybody knew or not, but if you take a strip of bias cut fabric and a hot steam iron you can actually make the strips turn into a circle. As you can see, the longer the strip the better . I was looking for the right gray to go with my gray and white hat to put around cut out sinamay circles (I am obsessively picky about colors matching and couldn't find the right shade of gray) The fabric is plain poly/satin. This technique would probably work much better with a natural fabric like silk or cotton.