Bias binding when you open it up has 2 different seam allowance widths. I put the raw edge of the opened up binding against the raw edge of the sandwich, sew and then flip it to the back and top stitch on the other folded edge. To make loops, I leave it folded and top stitch along the length for 1/4 inch wide strip. The sewn strip can then be made into loops. Keep in mind also that you can make the loops continuous (ribbon candy design) and sew across them all at once in the seam allowance.