These muffin/cup cake pans are made of 1, 0mm heavy aluminum construction with the cups permanently seamed into the frame, Cup Capacity: 24, Top Cup: 2-3/4"" - (7 cm), Bottom Cup: 11-5/16"" - (5 cm), Dimensions: 20-5/8 x 14-1/8 x 1-1/8"" - (52, 4 x 35, 9 x 2, 8 cm), Case unit: 12, Materials: Aluminum, Thickness: 0, 9mm, SKU: UPI1701