I cut all my bindings 1 3/4", then fold in half. However, for table toppers and placemats I find a variation birthing works best. I make my backings 2 pieces so it will have a seam down the middle, but I only sew the seams on the ends so there is an opening in the center. Sandwich as normal, and sew all the way around the outside. Birth the quilt through the opening left in the backing seam, then hand stitch the opening closed. Doing it this way all the outside edges lay flatter as they don't get stretched or folded unevenly during birthing and hand stitching.