Continue until only one side is open, stuff as firmly as required. Now continue stitching until only a small opening is left at the top. This is to allow you to insert the beginning and end of the decorative cording (I usually make mine using the same thread as in the piece for a custom look).
When I stitch on the cording I have the needle coming out into the piece as shown. This allows me to stitch the cording on firmly and without the stitches showing.