And man is that thing big! Yowza!
I don't own any of the Karmans myself so I can't really hazard any guesses at what the dimensions are, but I have seen those minis first hand so I know that thing will be massive! As Aftermath from the forums said, "I think I need a bigger box."
The only downside will be that it will be that much harder for a unit that big to navigate the battlefield which is not a bad thing considering how much damage that beastie can do.