Disposable or reusable. This is the perfect brownie pan. Pan uses 1 box of brownie mix or 1 box of cake batter. Pan bakes evenly with no hot spots for perfect results. Can also be used for reheating, freezing, storing or roasting. Pan measures 12 3/4" X 8 3/4" X 1 3/8". Bulk packed 100 pans per case.