I save all my batting pieces....only throw away something smaller than 4". I have sewn together several pieces to make a large enough piece for a lap quilt. I just but the edges (not overlapped) and then use a multi-stitch-zig-zag to connect the pieces.... If the pieces are too small to effectively piece I save for potholders, place mates, christmas crafts (snow ?) and use up in a baby flannel rag quilt.....