Including the frill, the skull of this Vagaceratops irvinensis would be 1.4 m long in real life. At its widest, the frill would be 1 m. It is likely the frill was useful for species recognition and display rituals, especially during courtship and combat (it would make the animal look larger).

This animal would be about 3 m long from the tip of its snout to its hip, with its tail adding another 2 m. The tail would have been very heavy, and would have acted as a counterbalance to the weight of the skull at the other end.