I try to use the same type of batting for most quilts. I save the scraps and piece them into other batting when necessary. I square the edge of the pieces and mark their size when storing them. I purchased tricot fusible interfacing by the yard (I think it was 60" wide. Then I cut it into 1.5 inch strip using my rotary cutter and mat. That was a huge savings-in fact, I packaged it up in baggies and shared with my quilting friends.