From the Kwik Sew website:
These fabulous potluck companions are fat quarter friendly. The casserole carrier is made from four different color fabrics, has thermal insulation between the layers and double layers on the bottom. It has two flaps that cover the top of the dish and a convenient pocket for a serving utensil. The sides cradle the dish, making it easy to carry a 9" x 13" (23 cm x 33 cm) pan, a round or an oval dish. Pattern includes ¼" (6 mm) seam allowances.