I do not save the edges cut off to make the fabric straight, nor do I save the selvedges. (I don't cut them off lengthwise anyway. I keep the selvedges on the fabric until I cut my strips, and then I cut the least amount of selvedge off, which is less than 1/3". ) There is too much else to do, sew, and plan for than how to possibly use pieces like this; saving and shipping them to others is not eco-friendly either.