Ceramic Chef Cooking Stone The unique thermal conductivity properties create a uniform surface temperature that eliminates hot spots. It retains heat after removing from grill or oven so food stays hot while serving. It is oven-, broiler-, and microwave-safe. Clean up is a snap, either in the dishwasher or with water and a grill brush. Measures about 12"d x 15"w x 3/4"h. Made in the USA.