 The parietal bones — a nearly complete left parietal and fragmented right parietal — were used to deduce the cranial capacity of the hominid, which was placed at 663 cc in account of the fact that the fossils belonged to a 12- or 13-year-old male.This was extrapolated by Phillip Tobias to 674 cc for the hominid's full adult potential.However, other scientists have estimated the cranial capacity at 590 cc to 710 cc.