Heads

The eyes are roughly halfway down the head. From what I've seen, unless you're paying attention, you WILL make the top of the head too short. It's some kind of weird universal phenomenon.

When I first heard that, I had a hard time seeing it. I was checking people on TV, in magazines, on the street, and just seeing if the dimensions of the face were really like that. There are variations, but the rule is pretty solid. But there is an off point to it.

The lowest spot on the face is the front of the chin. Unless you've got some kind of fatty double-chin. But the highest part of the head is actually back beyond the center point of the head. So keep that in mind when you're measuring people. It threw me off for a while.

The eyes, if you're looking straight at someone's face, are generally one eye-width in from the side, and one eye-width apart. So it goes no-eye (left-edge), eye, no-eye (center), eye, no-eye (right-edge).

If you draw a 45/45/90 triangle

from the outside edge of the eyes to the bottom of the nose, with the 90 degree part on the bottom of the nose, the 45 degree points should be at the outside edge of the eyes.

The mouth is roughly phi down from the nose. A lot of people say the mouth is 1/3rd down from the nose to the chin, but the real number is phi, which is closer to 38% than 33%.

The ears go roughly from the top of the eyes to the bottom of the nose. If the head is tilted at all, they will quickly change.

The head itself is mostly egg-shaped. Seen from the front, it's (again) phi as wide as it is tall. That means it's "roughly one third" the width as the height, but really closer to 38% as wide as it is tall.

The top of the neck is never wider than the head itself.