I posted before about not getting the Dreq (Wanzer form FrontMission) Size but I went to the wikia (is that really the only FM wiki?) just to check if I could find anything there and on the article about "Wanzer" it is stated that "...Tend to be around 5.5 meters tall, and on average, weigh roughly 25 tons." ([url=http://frontmission.wikia.com/wiki/Wanzer#Overview]source[/url])
I just did that to get more data but if [@Aristo] wants it to be of different size, it still no concern of mine.