Leftover batting is valuable! I sort it by type, and when I'm ready for a batt I can machine zig-sag pieces together, paying attention to the grain,until I get the size I need. On anything other than low-loft, hand-whipping the edges together maintains the loft better. The machine stitching compresses the batting a bit, but on Thermore or other low-loft I"ve had no problem. But the grain matters. Enjoy making "free" batts!