I like to have about 1/2" binding on my bed quilts. I cut the binding at 2.5", trim the batting a scant 1/4" beyond the edge of the quilt top, sew the binding on so that its edge matches the edge of the quilt top (not the edge of the batting) with a 1/4" seam. That leaves 1" of binding to be flipped over the batting and brought around to the back. Since the batting is just under 1/4", it is just the right amount to just cover the seam I made when sewing the binding on. I am very frustrated with binding tutorials that never seem to mention that you need to trim the batting at a different distance if you want a wider binding without cutting off points. It's something that is almost always left out.