Stainless Steel Idli Maker with 4 Ss Idli Racks by Premier Diameter of the each Idli rack is 7.75 inches. 4 X 4 Plates makes 16 Idlies.Each Idli mold is 3 inches in diameter. Depth of Idli mold is approximately 5/8 of an inch. With pressure release whistle The trays are stacked and secured through a center rod.The trays do not come with handles