30.5 cm. A Burdy Family company. Non-stick coating. Non-stick silicone coating - PTFE & PFOA free. Fluted surface for even baking. Heavy gauge aluminized steel. Non-stick coating. Non-stick silicone coating - PTFE & PFOA free. Manufactured by the world's largest producer of commercial bakeware. Limited lifetime warranty. Materials sourced globally. Made in the USA.