If they're anything like most carnivorous large land species, they're three-quarters the size but of similar bite strength and head size (distinguishing them from adolescent male orcs). Statistically speaking, they're also uglier, as in almost all large land species the male develops the more marked secondary characteristics in order to show fitness and attract mates (manes, crests, tusks, antlers, etc).
How are you supposed to tell which ones are female?
If they're anything like most carnivorous large land species, they're three-quarters the size but of similar bite strength and head size (distinguishing them from adolescent male orcs). Statistically speaking, they're also uglier, as in almost all large land species the male develops the more marked secondary characteristics in order to show fitness and attract mates (manes, crests, tusks, antlers, etc).