Once in a while I'll spend a day making string squares. I used Bonnie Hunter's String Quilting Primer to get started, and so far have made almost 100 squares. They're 5 1/2 inches, and I think I'll need almost 300 to make a full/queen sized quilt. Or is it almost 400? I don't know right now. I just crank 'em out. About 5 hours of sewing produces anywhere from 25 to 35 squares.