I think you are asking whether we leave the batting hanging out past the cut edge of the squared up quilt top and back. I don't, because I've never figured out how to do that when squaring up the quilted quilt. I just line up my biggest square ruler and use the rotary cutter to cut and square up the quilt. Then I stay stitch all around the squared up quilt again. (I always stay stitch around my quilt top once it is finished and before quilting.)