Head and body length of O. leucoryx varies from 1,530 to 2,350 mm. Tail length is 450-900 mm, and shoulder height is 900-1,400 mm. A mane extends from the head to the shoulders and the tail is tufted. Males also have a tuft of hair on the throat. Both sexes have horns ranging from 600-1,500 mm in length. They are fairly straight and are directed backwards from the eyes. The horns of females are usually longer and thinner than the horns of males. In general, the coloration of adults varies from cream to grays and browns and they may have striking markings of black and brown as well. The young are shades of brown and have markings only on their tails and knees (Nowak, 1999).

Range mass: 100 to 210 kg.