This question asking why the menorah didn't have rings and staves for carrying reminded me that, unlike with the other mishkan objects, we're not given any dimensions for the menorah. I've always imagined it as large enough to stand on the ground and provide overhead light. (That image is probably reinforced by the arch of Titus, but I'd be cautious about inferring too much from that.) But was it?
According to Rashi on Shemot 25:31, the menorah was cast from a talent of gold weighing 64 pounds (citing Tan. Beha’alothecha 3). The size question also came up in our torah study recently, where none of the chumashim on hand provided illumination. An engineer who was present told us that that amount of gold would yield something closer to a table lamp than a floor lamp. This site says that a kilo (2.2 pounds) of gold is about the size of an iPhone 6. 30 of those doesn't seem enough to make a large, solid (not hollow) menorah.
I know that the group in Jerusalem who are building utensils for the third temple interpret it as a floor lamp, like what I imagined. I don't know their sources.
How tall was the menorah? Sources, please.