Natural, Uncoated, Standard Muffin Pan with 12 wells. Overall Pan Size 15.75×11.25 x 1.25 inches. Each cup is 2.75 x 1.25 in. Cups are well spaced for even baking. Steel wire under rim prevents warping. Made of Aluminized Steel with benefits of being less reactive to acids, corrosion and rust resistance, as well as higher heat tolerance than Aluminum. Made in China by Chicago Metallic.