I know this was posted about before, the method being from the MissouriQuiltCo.com or on YouTube.
This week I need to create a couple of 12 1/2 inch blocks to send for a QOV quilt and I wanted to do something fast and easy. So I tried this method and wow I love it. I did starch the fabric to make it stiff and to keep the bias from stretching.
The big one turned out just right, the smaller pinwheel in a frame came out a smidge less than I wanted all around and I did not want to make it smaller by trimming it perfectly square.
warm quilt hugs, sue in CA