4" x 10". 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. Add our option of pulleys for a really nice industrial look. These lamps plug into any wall outlet; no wiring required.