I just finished sandwiching two small quilts both about 40 inches square. My batting roll is 60 inches wide. For the first quilt, I cut the batting and backing 60 x 45, sandwiched the quilt and cut off the 13 inches or so at one end. I used that strip and several others that I had saved from other sandwiching (I make mostly smaller quilts, 45 x 55) for pre-K children). I laid the batting strips on the backing, edge to edge, no sewing, until it covered the entire backing, sprayed with basting spray and laid the top on that, smoothing it out. Had to spray between backing and batting also. It quilted very nicely. I have used this method with several of my smaller quilts with good results. Really small pieces get cut up and stuffed into pet pillows.