This 18 gauge anodized aluminum individual mini pie pan measures 4" top outside x 3" top inside and 1 1/2" deep. 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 bakeware offers superior baking performance, even heat distribution, safety, and durability. Dishwasher safe.