The T. rex skeleton found in South Dakota measures 38 feet in length and 12.5 feet tall, with a skull of 54 inches, according to the art auction firm Sotheby’s."Gus," a mounted Tyrannosaurus Rex skeleton, at the Sotheby's Breuer building in New York.Timothy A. Clary / AFP via Getty ImagesJuly 14, 2026, 11:20 AM EDTA Tyrannosaurus Rex found buried on property belonging to a South Dakota cattle rancher sold Tuesday for $50.1 million, becoming the most expensive dinosaur sold at an auction. Just a moment.We are getting your experience ready.