We were uncertain of the size of this lamp head. We saw the dimensions but it was difficult to grasp the true dimensions but we bought the larger of the two  lamp heads and hoped for the best. We were very pleased to what we bought. The beveled glass panes and the quality of the pieces makes it a excellent decision for us to add to the front of our home lighting the driveway. We have not purchased the pole yet but we will in a month or two.