I've made two kinds of flannel rag quilts. One is with BATTING in the middle of each block (cut smaller than each layer of flannel), after sewing together I had to X each square and then rag all the edges too. The other rag quilt has 3 layers of flannel ALL the same size. I have used the second method a number of times, because I didn't have to cut different sizes of flannel and then batting (I didn't have to think about what I was cutting, or what I was putting together - I'm old so I need to save my brain for math with HST - lol). Both methods work great, I think it is just a personal choice or what you learned. Good luck