Kannemeyeria was about 3 m (10 ft) in length, about the size of an ox. It was well-adapted to living as a herbivore; it had a powerful beak and strong jaw muscles built for shearing plant material. Although it had a large head, it was lightweight due to the size of the eye sockets and nasal cavity. It also had limb girdles which formed massive plates of bone that helped support its heavily built body.
Various species of the genus Kannemeyeria are known from South Africa, Argentina, India, and (either this or a similar genus) China, and it can be assumed that, like many animals of this time, it had worldwide distribution.