Physically, rams and ewes are remarkably similar. Their mass can be as much as 85 kg. A characteristic of the Blessbock is the prominent white blaze on the face and a horizontal brown strip which divides this blaze above the eyes. Body colour is brown with a lighter-coloured saddle on the back, and the rump an even lighter shade. The legs are brown with a white patch behind the top part of the front legs. Lower legs whitish.
Both sexes carry horns, ringed almost to the tip. Female horns are slightly slenderer and are almost black. Those of the male are thick in the basis and seem to be grey or yellowish in colour. The length of their horns averages at around 38 cm. Blessbock can be easily differentiated from other antelopes because they have a distinct white face and forehead. Male adult Blessbock average around 70 kg; females average lower, at around 60 kg.

Blessbock have one calf normally around January to February. Calves are easy prey for predators so they are not easy to breed.