"Gigantopithecus" has traditionally been restored as a massive, gorilla-like ape, potentially when alive, but the paucity of remains make total size estimates highly speculative. The species may have been sexually dimorphic, with males much bigger than females. The incisors are reduced and the canines appear to have functioned like cheek teeth (premolars and molars). The premolars are high-crowned, and the fourth premolar is very molar-like. The molars are the largest of any known ape, and have a relatively flat surface. "Gigantopithecus" had the thickest enamel by absolute measure of any ape, up to 6 mm (a quarter of an inch) in some areas, though was only fairly thick when tooth size is taken into account.