Stunning hummingbird mug by Laura Zindel is just over 4 inches high by 4 inches across so it will hold a full 8 oz. of your favorite beverage. Inside of mug is dark brown glaze. (hummingbird on each side of the mug) Image is drawn in pencil, then printed with enamel to become ceramic transfers. Process is known as transferware, while a delicate process, ceramics are durable.