I think somewhere in that line. My United Nations armor above is on a 1/2″ x 1″ base, with a 1/4″ wide label, if that helps you get a sense of scale.
Incidentally, I’ve been thinking about getting a pair of the new Microworld super tanks, putting them side by side and adding a flight deck on top, to make a landcarrier. Might work for other such things as well. The New Earth line is on pre-order and has a lot of potential I think.