This round shaped insulated carrier is 13 inches in diameter when flat. It can carry a pie pan, expand in height to carry a 2 quart casserole container or be flexible to carry other shaped containers that can fit inside of it. It's insulated to help keep your food either hot or cold when transporting it. The carrier opens wide to allow for easy placement of the food container and has a tie closure to keep everything secure to provide ease in transporting your food container. The carrier's outer fabric and inside lining are cotton fabric and the insulation is a polyester batting making it machine washable in warm water. It comes in a wide variety of fabric choices.