Adult male Thorold's deer have antlers, measuring up to in beam length, and weighing up to . Compared with those of wapiti or red deer, the antlers are flattened with the first and second ("bez") tines noticeably far apart. The antlers can have up to seven tines, which all lie in the same plane. They are shed annually in March, reaching their full length by late summer. Other distinctive features include longer ears than most other deer, lined with white hair, and large metatarsal and preorbital glands. The hooves are broad and heavy, with unusually long dewclaws. The tail is short, at in length.