The Rada Cutlery Stoneware Pizza Baking Stone absorbs heat to maintain an even baking temperature. The textured surface produces pizzeria-type crusts for superior results. Rada stoneware can go directly from the freezer to a pre-heated 400 degree oven without cracking the stoneware. No pre-use seasoning is required: before using your stone for the first time, simply rinse it in warm water and towel dry. There is no need to season and re-season before every use, Rada stoneware is naturally stick resistant. A light spritz of cooking spray will enhance the release properties for use with egg dishes or wet batters. Rada stoneware is dishwasher safe! Unlike most other brands of stoneware, Rada stoneware can be washed in the dishwasher. Rada stoneware has a 3 year manufacturer warranty against defects in material, construction or workmanship. (The warranty does not apply to damage resulting from misuse, abuse or accidents.) Stone measures 15 inches round.