Designed for sheet cakes and large batches of cookies. Heavy gauge aluminized steel promotes even heat distribution Swiss engineered PTFE, ceramic reinforced, 2 layer, commercial grade coating provides the ultimate non stick food release and is scratch, stain, corrosion and abrasion-resistant Micro textured pattern ensures even baking by minimizing surface contact and promoting airflow Square rolled edges add strength and offer a secure grip for easy transfer to and from oven The OXO Better Guarantee: If you experience an issue with your OXO product, get in touch with us to repair or replace it. We’re grateful for the opportunity to learn from your experience, and we’ll make it better Internal dimensions: 11.49-in x 16.36-in (29.19-cm x 41.57-cm)