Love Elmer's Glue. With it you can have same size front and back, even though I leave about a 2" margin on the back and batting.. When I use this method here are a couple of things I do that make it easier. I mark my backing on the edges of the lengthwise fold and the width fold with a washable marker. Then do the same for the batting and the top. Makes lining up very easy. Usually after gluing the batting to the back and then to the front I use my hands to smooth press the batting and fabric together. Yesterday I had a light-bulb idea. Why not use a rolling pin? I tried it, and wow, it really did the trick. Another re-purposing for an old favorite.