Ilokelesia was a medium-sized theropod. In 2010 Gregory S. Paul gave a length of 4 meters (13 ft) and a weight of 200 kg (440 lbs). In 2016 it was estimated to be in length in a comprehensive analysis of abelisaur size. The same year another estimation listed it higher at 5.8 meters (19 ft) and 840 kg (1,850 lbs). It is characterized by features of the skull, namely of the quadrate and postorbital bones. The vertebral series also has distinctive characters setting it apart from other abelisaurs, such as reduced processes on the cervical vertebrae and dorsal vertebrae lacking pleurocoels.
