Pyrex Professional 12-Cup Muffin Pan 12-cup nonstick muffin pan made of commercial-weight steel Portion guides on inside of each cup simplify the measuring process Extra-wide edges offer a secure grip and prevent spilling over while baking Dishwasher-safe; oven-safe to 350 degrees F; metal-utensil safe Measures 11-1/2 by 15 by 1-1/4 inches; limited lifetime warranty