Heavy-duty milliner's buckram interfacing with steam adhesive on one side. 
Four (4) pieces 4x4 inches each. This old-fashioned interfacing is terrific for finishing ornaments or other small folk embroidery projects that you want to be very rigid. You position where you would like and then steam it with your iron to set it. It can be sewn on with a machine if needed.
 
Please note: the buckram will arrive and be a bit "curled" because I'm cutting if off of a large roll. Once you press it into place, it will lay flat.