So you did the cotton batting to the backing piece and the Encil bright you stitched to the top piece of fabric? And exactly where are the darts? I see two corners and then it looks like they’re along the sides? Is that a total of four or six darts?
@laurawhittaker7217 Hello, these are the measurements I have used for a 9" x13" pan Fabric: (2X) 15" X 19 1/2" Insul-Bright (1) 15" X 19 1/2" If you would like a thicker pad you can add a layer of cotton batting. Happy Sewing!