Jul 28, 2016 · Using a ½” seam allowance, stitch all the way around the apron, leaving just the 5 – 6″ opening along the bottom. To help reinforce the ends of the ties, double-stitch over each one. Clip the rners at a diagonal. If this is an apron that will be laundered often, nsider finiHDPEng your seam with a sewing machine or serger.