Since I am part of a nonprofit that makes and gives away quilts, there are a lot of batting scraps. We use W&N Soft & Brite. Most of the quilts tat we consider "twin" are between 70" - 82" long. If there is a strip of 8" left after quilting, I keep that and use it in crib quilts. I don't sew it together, just layer it next to each other. The quilts I am quilting are flannel and the batting stays in place. The off cuts on the side are recycled. The Goodwill will take fiber, old clothing, offcuts of batting, even a vellux blanket that my dog shredded one afternoon, and fiber is ground up and used for insulation. We were using it to stuff dog beds but the shelter no longer wants dog beds. They are using a hammock bed instead.