Ceratosaurus was 15 to 20 feet long (4.5 to 6 m) long, weighing roughly 0.5 to 1 ton (500 kg to 1 tonne). It had a skull a snout horn and two short brow ridges, and bony knobs and ridges above its eyes and on the top of the head. This common hunter had large, powerful jaws with long, sharp, teeth.