4" diameter and 10" tall. Includes a quart Mason jar with no bottom. Use these for higher wattage bulbs such as 40 or 60 watts. Shown with our 40 watt vintage bulb, not included. With the open bottom and ventilation on the top, these provide plenty of light while keeping everything cool. Our pendant lamps include it all: 15½ foot cloth-covered lamp cord with switched socket, two finished ceiling hooks, two cord clamps for adjusting the height of the lamp, and easy-to-follow instructions.