Jaw & chin measurement
Mandibular Plane Angle
Steepness of the jawline relative to the Frankfort horizontal. Low values indicate a flat, horizontally growing jaw; high values a steep jawline and a long lower face.
At a glance
- Ideal
- 15–22° (men) · 15–23° (women)
- Unit
- degrees
- Weight in the overall score
- 7.5
- Area
- Jaw & chin
How it is measured
∠ between Go→Me and Po→Or (Frankfort horizontal)
- Go Gonion (jaw angle) — The corner of the jaw, where the lower border turns upward toward the ear.
- Me Menton — The lowest point of the chin.
- Po Tragion (porion) — The top of the tragus — the small flap in front of the ear canal. With orbitale it defines the Frankfort horizontal.
- Or Orbitale — The lowest point of the bony eye-socket rim, just below the lower eyelid.
Ideal range and tiers
Each value falls into a tier (T1 = ideal). Comfortably inside T1 the rating is 10, easing to 9.5 at the edges of the ideal range; beyond it the rating falls with the deviation — fastest in the first tiers outside the ideal — down to −10 (below 0 where the original tier sheet takes points away) at the far end of the worst tier.
| Tier | Range | Rating |
|---|---|---|
| T1 Ideal | 15–22° | 9.5–10 |
| T2 Near ideal | 14–15° or 22–28° | 6.7–9.5 |
| T3 Mild deviation | 12–14° or 28–30° | 4.3–6.7 |
| T4 Moderate deviation | 10–12° or 30–35° | 2.1–4.3 |
| T5 Severe deviation | < 10° or > 35° | −10 to 2.1 |
| Tier | Range | Rating |
|---|---|---|
| T1 Ideal | 15–23° | 9.5–10 |
| T2 Near ideal | 14–15° or 23–28° | 6.7–9.5 |
| T3 Mild deviation | 12–14° or 28–30° | 4.3–6.7 |
| T4 Moderate deviation | 10–12° or 30–35° | 2.1–4.3 |
| T5 Severe deviation | < 10° or > 35° | −10 to 2.1 |