How big was a extankosaurus rex?

The Extankosaurus rex is not a recognized dinosaur species; it seems to be a fictional or misnamed creature. If you're referring to the well-known Tyrannosaurus rex, it measured about 40 feet long and stood around 12 feet tall at the hips, weighing between 9 and 14 tons. If you meant a different dinosaur, please clarify, and I'd be happy to provide more information!