Harmony & facial ratios
Top Third
1 min read · Updated October 4, 2026
The forehead band, from the hairline to the brow line, as a share of total face height.
What it is
The face divides into three horizontal bands. The top third is the forehead: it runs from the hairline down to the brow line. It is expressed as a percentage of the full height from hairline to chin, so a perfectly even face would read about 33% in each band.
How it's measured
The brow line, the hairline and the bottom of the chin are placed from detected landmarks, in a frame levelled by your eye line so a tilted head doesn't skew the result. The hairline is the hard part: hair, a fringe or a receding line move the visible edge, so it is estimated from the face's own landmarks instead of read off the pixels. That makes the top third the least precise of the three thirds.
How it's read
Most analyses treat a figure near a third, give or take a few points, as balanced. A somewhat taller or shorter forehead is very common on attractive faces, so a small miss here carries little weight. Ranges are set separately for men and women, but the difference between them is small.
What affects it
Hairstyle changes how tall your forehead looks without changing the measured number much, because the hairline is estimated. The biggest source of error is camera angle: pitching your head up or down changes how tall each band looks, and not in a way you can correct by eye. If the number surprises you, retake the photo level and straight on first.
For more detail, see the full guide: Facial thirds.
Related measurements
In the same group: Middle Third, Lower Third and Lower Third Proportion. The full list is on the Harmony overview.
See it on a full report
Open the sample report to see every measurement, score and highlight on a real example.