I like to cut my blocks in 8 or 10 inch squares for the best use cross-wise of the fabric. I do not use batting on flannel quilts, but use a complementary color flannel for three layers. This way it makes the fluff or fringe much fluffier especially for baby quilts. I do not need to sew the "x" in the middle as all the seams are sewn together. I f I use batting for adult quilts, I spray baste the batting to one of the pairs of squares which makes it easier to sew them together. I have used homespun for adult quilts. My husband calls his "His Magic Quilt" as every time he uses it he goes right to sleep.