Lower Third Proportions
How the lower third splits between your upper lip and the chin below it.
| Reference (male) | 2.000 chin segment ÷ lip segment |
|---|---|
| Reference (female) | 2.134 chin segment ÷ lip segment |
| Weight in composite | 5% |
| Category | Proportions |
Where the lower third splits again
The bottom third of the face subdivides again at the mouth: the distance from nose base to the lip line, against the distance from the lip line to the bottom of the chin. Classical guidance puts this near 1:2, meaning the chin section is roughly twice the lip section. It is a strong driver of whether a lower face reads as balanced or compressed.
Vertical distances, not straight lines
The app divides the lower segment by the upper one and compares against 2.000 for men and 2.134 for women — women referencing a proportionally longer chin segment. Both distances are measured vertically rather than as straight-line distances between landmarks, because a straight-line measurement inflates whenever the two points are horizontally offset.
Small weight, strong interactions
Only 5% of the composite depends on this directly, but it interacts strongly with facial thirds and philtrum length — all three read the same region, and a change in one usually moves the others. If your lower third scores poorly overall, this metric tells you whether the cause sits above or below the mouth.
How 123,813 people score on lower third proportions
Most scans land in the upper bands, with a small but real tail at the bottom. That tail is the informative part: because the tolerance is fairly forgiving, a low score here is unusual enough to mean something specific — a lip segment or chin segment genuinely out of proportion, rather than the ordinary near-miss that produces a mid score on most metrics.
| Score band | Share | % | Scans |
|---|---|---|---|
| 0–19 | 6.5% | 8,104 | |
| 20–39 | 7.2% | 8,947 | |
| 40–59 | 11.3% | 13,970 | |
| 60–79 | 18.6% | 23,001 | |
| 80–100 | 56.4% | 69,791 |
Mean 74.06 out of 100 — 7th highest average of the 16 metrics. Figures from MogTracker's own scans, captured 2026-08-14.
How to improve your lower third proportions
The lower third should subdivide with lips taking 1/3 and chin taking 2/3.
Recommendations are grouped by how invasive they are. Non-invasive options change how the feature reads to an observer; surgical options change the underlying structure and therefore the measurement itself.
If you scored Excellent
Your lower third subdivision is ideal — lips and chin are in perfect proportion.
Non-invasive
- Lip hydration and care to maintain current fullness and proportion
If you scored Good
Your lower third is well-proportioned. Minor adjustments could perfect it.
Non-invasive
- Beard shaping at the chin line can fine-tune the visual proportion
Minimally invasive
- Small amount of chin filler for subtle projection adjustment
If you scored Average
Your lower third subdivision is slightly off. Chin or lip proportions could be improved.
Non-invasive
- Beard styling to visually lengthen or shorten the chin area
Minimally invasive
- Chin filler for added projection and better lower third balance
Surgical
- Lip lift (bullhorn technique) if philtrum is the long component
If you scored Below average
Your lower third proportions are significantly off-balance — either chin is too long/short or lip area is disproportionate.
Non-invasive
- Strategic beard styling is essential for rebalancing lower third visually
Minimally invasive
- Chin filler for projection or lip filler to adjust lip-to-chin ratio
Surgical
- Sliding genioplasty for precise chin length and projection correction
- Lip lift (bullhorn) to shorten philtrum by 3–6mm if lip area is too long
Common questions about lower third proportions
What is the ideal lips-to-chin ratio?
Approximately 1:2 — the chin segment about twice the lip segment. MogTracker references 2.000 for men and 2.134 for women.
My lower third scores badly. Which metric tells me why?
This one. Facial thirds tells you the lower third is out of proportion with the rest of the face; this splits that third at the mouth, so it identifies whether the excess sits in the lip segment or the chin segment. Philtrum length narrows it further.