Keira Knightley square jawed and delicate
Typical British physique for Keira: the strong and jutting chin is often seen on British, and more generally some Celtic women. Keira is square jawed, but still, she radiates a delicate impression.
One particularity is the soft jaw angle when looked from profiles, which would be expected to be squared when you see the projecting jaw angles from the front.
So only a B- grade for gonial angle, but A for chin, and flat jawline classification.