How to sew a drawstring satin bonnet. Take a square 3/4 a yard on each side. measure 9 inches from each corner (make the triangle) and cut it off. Leaving you with a stop sign shape. place the ribbon/drawstring along the sides. Fold over about 1 1/2 inch, pin, and sew down the edges. She uses charmeuse satin because it keeps our natural oils and moisture in our hair and not on the pillow. I want to make a double lined bonnet. Brilliant!