I cut my binding 2 1/4 inches (I prefer bias binding in most cases), use 3/8 inch seam. I sew it on the back first and turn it to the front. I press the binding seam before turning it to the front. I hold the seam, as I stitch with an awl so the fold just covers the first stitching; on the back, the stitching is in the ditch. I an very happy with the result. I think the pressing is the key to success.