The copper base has a typical green patina. Base is 5" wide by 5" tall (with this particular glass shade the malp is 11" tall, so it's a cute small accent lamp).
This small lamp has been in the family for at least 100 years. The original milk glass shade was round and it broke a while back, so we got a modern replacement here, but you can pick one you may like better for it. -It takes a standard bulb, which can be LED.