The Ultimate Rectangular Pizza Stone, 14” x 16”, for Cooking & Baking on Oven & Grill. Exclusive ThermoShock & Core Convection Technology for a Crunchy Crust. Patented No-Spill Stopper & Recipes eBook. Note: Sometimes during the production of the stone, it will develop some minor lines or "cracks" on the no-spill stopper; those lines are just superficial, the stone will NOT break and those lines will not interfere with your cooking experience.