I have made two French braid quilts out of scraps. I cut them 2 1/2 by 7 1/2. I have put a solid color between the rows which I think really makes it pop more. The rule of thumb is whatever the width, the length should be 3x's that. You can really do a lot without a pattern; just use your judgment. The first one I made I was going to give as a charity quilt but my two granddaughters talked me out of it. I am working on another one right now. Good luck.