Cheekbone width
The distance between the highest points of the two cheekbones, usually the widest measurement of a face.
Also: bizygomatic width
Cheekbone width runs between the most outward points of the cheekbones, a little below and outside the eyes. Anatomists call it bizygomatic width, after the zygomatic bones. On most faces it is the greatest width, and on diamond and oval faces it clearly is. It is also the measurement opticians check against a frame: frames much narrower than the cheekbones can look pinched, and frames much wider can slide.