Facial thirds
An artists' guide that splits the face into three bands of similar height: hairline to brows, brows to nose base, nose base to chin.
Also: rule of thirds (face)
The facial thirds come from drawing and sculpture teaching, back at least to the Renaissance. The face is divided by lines at the brows and at the base of the nose, giving three bands that are often roughly equal. Artists use them to place features, and stylists use them to talk about balance. Real faces vary a good deal, and unequal thirds are entirely normal. The thirds are a drawing aid, not a measure of beauty.