30.5 cm. Durable heavy-gauge aluminum for even heat distribution. Reinforced triple-layered nonstick interior for easy food release. Porcelain enamel exterior for lasting shine and quick cleanup. Riveted stainless steel handles for stability and strength. PFOA-free. Oven safe to 480 degrees F (glass lid 350 degrees F). Limited lifetime warranty. www.gibsonusa.com/warranty. Gibsonusa.com. Made in China.