I have this book. Do you know it takes 1 3/4 yard of fabric per ring? For a twin size quilt it takes 21 yards of fabric and 5 yards of 45" batting. I wanted to make a king size but never gathered up 18 3/8 yards of backing fabric, 8 yards interior square fabric, and 9 yards for arc fabric, at one time. That's a lot to put in one quilt.