Someone on a blog asked how tiny of pieces do you keep. Most of the pieces on the little mini quilts that I make are 1" square or less. I only save batiks that small because they don't ravel as easily or as fast as regular quilting cottons. Most everything in the bag of scraps is considered too small to sew so I just layer them overlapped slightly on fusible batting and then the quilting will hold them in place. I expect them to ravel some as they age. I'm not a fan of using tulle over the top to hold them down. I prefer the textured look of the raw edges on my little pieces of art.