User blog comment:BastionMonk/T. rex infobox/@comment-11047508-20120702145934

Wikipedia gives the following values:

height = 4 meter (13 feet) (from "Sue's vital statistics". Sue at the Field Museum. Field Museum of Natural History. Archived from the original on 2007-09-29. Retrieved 2007-09-15.)

weight = 6.8 metric tons (Erickson, Gregory M., GM; Makovicky, Peter J.; Currie, Philip J.; Norell, Mark A.; Yerby, Scott A.; & Brochu, Christopher A. (2004). "Gigantism and comparative life-history parameters of tyrannosaurid dinosaurs". Nature 430 (7001): 772–775. DOI:10.1038/nature02699. PMID 15306807.)

length = 12.8 meter (42 feet) (Henderson DM (January 1, 1999). "Estimating the masses and centers of mass of extinct animals by 3-D mathematical slicing". Paleobiology 25 (1): 88–106.)