Base is 9 diam. No damage to lamp. Top diam is 4 See photos. Twenty7Vintage on IG post 1930 items. TheAntiqueSocket on IG pre 1930 items. From the extensive collection of Justin Wager, the original illustrator for Tony The Tiger. We had the pleasure of purchasing more than 1200 pre 1930 lamps. There are about 7-800 slag lamps/bases that we are currently sorting through. All items are photographed from all angles in natural light with no filters added. We do our best to describe each item to the best of our knowledge. It is the BUYERS. (yes you) responsibility to carefully view each picture for a more direct description. You shouldn’t even need to read the description after viewing our photos they are so good. If there is a damage it will be photographed. These items are not brand new and may feature some wear and tear as to be expected with age. If you have ANY questions, feel free to reach out and we will do our best to answer them.