Put me on the list of those quilters who now save scraps as is without cutting. Many years ago I would cut all of my scraps into strips thinking I would make string quilts with them, but as I used those strips last year to make a braided rug I looked at some of them and wished I had the larger piece to use in a quilt. As for the size that should be saved, take a look at "crumb" quilts. Those use scraps less than an inch!