Einiosaurus is known to have a medium size and also an herbivore coming under the centrosaurine ceratopsian (horn faced) category which occurred in the cretaceous period also known to be campanian stage originating from Northwestern Montana. The meaning of their name is “buffalo lizard” derived from the Blackfeet Indian ‘eini’ and Ancient Greek ‘sauros’ holding a generic name procurvicornis in Latin language known as ‘forward-curving horn’.
Their snout looks narrow and pointed in their appearance with an entire body length of 4.5 meters and a weight of 1.3 tones evaluated by Gregory S. Paul in 2010. The Einiosaurus adults have a firm nasal horn which is curved towards the front and bottom directions, the nasal horn is a look alike of a bottle opener. Another set of horns known to be the supraorbital horns which are generally over-the-eye of the animal looks very low, short in their size and has a triangular shape in their appearance from the top view. There are some bony extensions on the ridge which are the third epiparietals which are nothing but pair of extensive spikes projecting towards the back starting from a frill which is somewhat small in its size, there are no first epiparietals found. The osteoderms which are found to be small enhances the ends of the frill.