Because the Hummer/Navigator/Escalade aren't big enough here comes the http://money.cnn.com/2004/09/13/pf/autos/monster_truck/index.htm?cnn=yes
At 258 inches, or 21-1/2 feet long, the CXT is about 4-1/2 feet longer than the new Hummer H2 pickup, and about 2 inches longer than the F-350 Crew Cab.
But the way it really towers over what's on the road now is in height. At 108 inches, or 9 feet, the CXT stands only a foot below a basketball rim and more than two feet above the Hummer or the F-350.
Insane. 6-10 mpg but I guess you could always tow a petrol trailer.