YES you are INCORRECT and owe someone an apology.
Hoth is 6x7KM - Early builds had 200m and 1K grid lines. In addition, I measured it. Hoth is an OPEN rectangle no tricks.
Kalimdor is 6.5x11Miles
Source for WoW
http://www.mmorpg.com/photo/68d4a45e-fe96-44c7-9b13-4bd25de47e78