Here is the Imperial Space Marine for size comparison.
See, these are the big brother of the Container scenery, a Land Raider can hide behind these easily.
(Image from King Fluff, blogger buddies at Battle Bunnies Blog - check them out! Great Pre-Heresy stuff everywhere!! - permission sought)
As you can see in the Battle Bunnies image above, the GW containers barely cover the Tech Priest, and a Marine can stand up inside, but no more.
Gamemat.eu the same as the Battle Mat shown. Check out the site. I pre-ordered these ages ago before GW was producing their versions and I didn't know GameMat were doing a line in pre-painted scenery too. Lots of industrial buildings and they look good basically painted, ready to add the details and transfers to taste.