From the fragmentary remains of "Thecodontosaurus", most of the skeleton can be reconstructed, except for the front of the skull. "Thecodontosaurus" had a rather short neck supporting a fairly large skull with large eyes. Its jaws contained many small- to medium-sized, serrated, leaf-shaped teeth. This dinosaur's hands and feet each had five digits, and the hands were long and rather narrow, with an extended claw on each. This dinosaur's front limbs were much shorter than the legs, and its tail was much longer than the head, neck and body put together. On average, it was long, or 1 ft. tall, and weighed . The largest individuals had an estimated length of .