A full-grown "Scelidosaurus" was rather small, compared to some later dinosaurs. Its length was about 4 metres (13 ft). "Scelidosaurus" was quadrupedal, with the hindlimbs longer than the forelimbs. It may have reared up on its hind legs to browse on foliage from trees, but its forefeet were as large as its hind feet, indicating a mostly quadrupedal posture.