Flange edge shams are pretty easy to make. Measure your pillow cases and add 4.5 inches to the width and measure for the length of your pillows. Cut one piece of fabric for the top that size. Cut two pieces for the back and cut them long enough they'll overlap in the center. Hem the overlap ends. Pin the three pieces right sides together and sew with a quarter inch seam. Turn right side out and sew 2 inches in from the outside edge to form the flange.