On one I did I made a row of hexes the length of the side.(it was a small quilt). I layered the quilt keeping the backing just slightly past center of outer edge hexes then put the row I did along the side like a facing right side to the back. Picture two hexes placed wrong sides together. I stitched the outer edges made sure the backing was under the row of hexes, basted and then quilted. Kept the shape of edges and made a nice accent row of hexes around the back of the quilt. Clear as mud right?