keywords: rex largest elephant tall feet
text: Growth and Mortality Details of T. Rex Get Clearer T. rex was one of the largest meat-eaters ever to walk the land when it died out some 65 million years ago. At an elephant-like 6 tons, it stretched about 40 feet to 45 feet long and measured about 13 feet tall at the hip. The adult skull alone was 5 feet long, with teeth up to a foot long.