Fat Daddio's 12-Cup Muffin Pan is built from 18-gauge anodized aluminum and features a rigid rolled rim for durability. Anodizing completely seals the aluminum, making a smooth scratch-resistant surface, and ensures there is no cross-contamination or leaching of aluminum into foods. Anodized aluminum is also non-reactive with acidic and dairy ingredients. Fat Daddio's anodized aluminum bakeware, baking pans and cake pans are precision engineered to offer excellent baking performance, even heat distribution, and durability. Bake your best with Fat Daddio's bakeware. Dishwasher safe. Lifetime warranty. Pan dimensions: 15-3/4-Inch x 11-1/8-Inch, Cup dimensions: 2-3/4-Inch W x 1-1/4-Inch H.