When I make a raggedy quilt, I cut my squares at 9" (arbitrary) and my batting at 7". Layer your 3 pieces (batting wrong side up, batting and top right side up) draw diagonal lines and stitch. Then, when you sew the pieces together, put them wrong sides together and stitch 1" seams. When you are all done, clip your seams about 1/4" apart then wash and dry.