Face length
The distance from the centre of the hairline to the tip of the chin, the first measurement in sorting a face shape.
Face length is measured from the middle of the hairline straight down to the bottom of the chin. Compared with the widest width of the face, it separates long shapes (oval and oblong) from short ones (round and square). A face about one and a half times as long as it is wide reads as oval. Where the hairline is high or has receded, stylists estimate where it once sat, or measure from the brow and scale up using the facial thirds.