Module
Jawline analysis: how Facet scores your jaw
Last updated: May 22, 2026
Facet's jawline module currently scores Facial Width-Height Ratio (FWHR), the ratio of bizygomatic width to upper-facial height. FWHR is a well-studied morphometric parameter correlated with perceived dominance, attractiveness, and gender expression. Profile-only parameters (gonial angle, Merrifield Z, facial profile angle, cervicomental angle) require a side-view CV pipeline and are deferred to V3.
Why this matters
The jawline is the structural foundation of the lower face and a primary aesthetic marker. Strong jaw definition reads as healthy, well-developed, and (in male faces) more dominant. Jawline definition declines with body fat increase, age-related skin laxity, and posture issues. Jaw augmentation, masseter Botox, and chin filler are all common interventions targeting this region. For most people, behavioral interventions (body composition, posture, mewing-style tongue posture) produce more change than they expect.
Parameters measured
| Parameter | Units | Citation | Note |
|---|---|---|---|
| Facial Width-Height Ratio (FWHR) | Ratio | Standard cephalometric references | Bizygomatic width / upper-face height; 1.85 is the gender-neutral midpoint |
| Gonial angle (deferred) | Degrees | V3 roadmap | Profile-only |
| Merrifield Z angle (deferred) | Degrees | V3 roadmap | Profile-only |
| Facial profile angle (deferred) | Degrees | V3 roadmap | Profile-only |
| Cervicomental angle (deferred) | Degrees | V3 roadmap | Profile-only |
| Merz sagging proxy (frontal, deferred) | Comparative analysis | V3 roadmap | Pending CV implementation |
What your jawline score means
| Score band | Meaning |
|---|---|
| 8.0 to 10 | Excellent. Strong jaw definition, FWHR in the ideal range for gender. |
| 6.5 to 7.9 | Good. Visible jaw definition, FWHR close to ideal. |
| 5.0 to 6.4 | Average. Jaw definition moderate; FWHR slightly off ideal. |
| 3.5 to 4.9 | Below average. Soft jaw definition. Body composition or sagging likely factors. |
| 0 to 3.4 | Significant jaw definition issues. Structural or skin laxity assessment relevant. |
How to improve your jawline score
- Body fat percentage is the single biggest controllable factor. Most people see meaningful jaw definition return at 15 to 18% body fat (men) or 22 to 25% (women).
- Proper tongue posture (tongue resting against the roof of the mouth) and nasal breathing can subtly improve jaw definition over months to years.
- Posture matters: forward head posture compresses the cervicomental angle and softens jaw definition visually. Postural training helps.
- For sagging or jowling, the relevant clinical interventions are HIFU/Ultherapy (non-surgical), thread lifts, or lower face/neck lift surgery depending on severity.
- Masseter Botox is used for square-jaw reduction (typically a goal for some female patients) or asymmetry correction. Not a definition-building procedure.
Frequently asked
What is FWHR?+
Facial Width-Height Ratio is the ratio of bizygomatic (cheekbone-to-cheekbone) width to upper-facial height (top of brow to lip line). It is a well-studied morphometric parameter. Higher FWHR is associated with more masculine features and (in some studies) perceived dominance. The gender-neutral midpoint is around 1.85.
Can mewing actually change my jawline?+
Tongue posture (mewing) can produce subtle changes in jaw definition over months to years, primarily by improving mid-face development in adolescents and reducing forward head posture in adults. The effect is real but modest. Mewing alone does not produce dramatic jaw changes; it is a low-cost low-risk supplemental practice.
Is gonial angle measurable from a front photo?+
No. Gonial angle (the angle at the back of the jaw) requires a profile view. Facet defers gonial angle scoring pending profile-CV pipeline. Upload a profile photo when V3 ships.
Will jaw filler permanently improve my score?+
Filler is not permanent (12 to 18 months typical), and aesthetic jaw filler results vary substantially by injector experience. Bone augmentation (via implants or sliding genioplasty for chin) is the permanent structural option. Both require surgeon consultation; both are irreversible.