Start by cutting both rolls of burlap into 9"-10" pieces. If you want the wreath to be tighter, cut 8". Make sure you cut them cleanly so that you don't end up with frayed ends. Set them aside.
Now begin with your beige pipecleaners. I recommend you use beige so that it matches your burlap. You don't want the piepcleaners to stand out against the burlap. You want it to blend smoothly. Take the pipecleaners, feed them through the grapevine, bend them back so that both pieces are facing towards the surface of the wreath. Do this every 2-3 inches. I would recommend 2" so that the burlap is tighter. The amount of pipe cleaners depends on how thick and wide your grapevine wreath is. It can vary drastically between grapevines.