Well, I was using the USB port as a frame of reference, since obviously external size references in the game are unlikely to be consistent... to me it looks somewhere along the lines of X1 Carbon size based on that. Maybe smaller. It’d be easy to derive more from the texture.

Using one of the USB-A ports for scale, the base seems to be 1.2 centimeters thick-- which I guess is more than a Macbook Air, but certainly not "a tank", IMO. For reference, my 2014 Thinkpad 440p has a base thats slightly more than 2 centimeters thick, and my Minecraft FPS can corroborate that it was never much of a gaming laptop ;)