I have made 7 bow tucks so far,I fold in the edge to match the rest of the seam and just as close to the edge as I can I sew it closed. Also I put plastic canvas for the bottom to be stiff and hold it's shape. I use 2 pieces and make the pillow case type sleeve for it.fold in the overhang between the 2 pieces of canvas. you can hand stitch it closed or just leave it inside. Cost of 2 pieces cut from 1 sheet of canvas is less than 50 cents. and is washable. Mary