Crafted of durable ceramic. Each has a 6-oz. capacity. Microwave- and dishwasher-safe. Glossy white finish. Oven-safe up to 400 degrees Fahrenheit. Baking area dimensions: 3D x 1.35H in.. The Omni Culinary Pro Ware Ramekin - 6 oz. - Set of 4 is great for baking and microwaving. Each of these glossy white ramekins is crafted of ceramic and is dishwasher safe for easy cleaning.