I just finished a rag quilt using a top and bottom layer of cotton and center layer of osnaburg (usually appx. 3.99 yd. at Joanne's). I used 9" blocks and snipped them down to 7" size. Sewing the X in the middle stabilized the block for sewing the rows. The quilt came out great and frayed beautifully. I'm getting ready to do a denim rag quilt with a single layer of denim and a single layer flannel. I can't wait to see how that turns out. I'm planning to use raw edge applique flannel shapes on the denim side to stabilize the block before assembling.