Around The Bobbin Hot Stuff Oven Mitt Pattern- Create your own designer oven mitt with a silicone overlay. Silicone overlay is 100% food grade silicone and heat resistant up to 450 degrees. Just add 3 fat quarters of fabric and cotton batting. Use ARBATB185 Hot Stuff Silicone Overlay Refill, sold separately, to make more oven mitts. Approximately 7.5 in. x 13 in. Includes one transparent silicone overlay, instructions, and cutting templates.