JawlineHow AI measures this feature and photo tips
The jawline defines the lower face contour from ear to chin. Its angle, width, and definition strongly influence face shape classification and perceived masculinity or femininity in AI facial analysis.
See this feature in action with our Face Analyser, Face Shape Analyzer, or Guess My Age.
Key Characteristics
- ✦Angular vs soft jaw corners
- ✦Jaw width relative to cheekbones
- ✦Definition visible in profile
- ✦Symmetry between left and right sides
- ✦Impact on square, round, or triangle classification
Analysis & Photo Tips
- 📸Profile photos reveal jaw angle best
- 📸Relaxed jaw avoids tension distortion
- 📸Even side lighting shows definition
- 📸Compare jaw width to forehead in front view
Related Features
Chin
Chin projection, width, and shape define the lower face terminus. Pointed chins characterise heart faces; wide chins suggest square or triangle shapes; recessed chins affect profile balance.
Cheekbones
Cheekbones (zygomatic arches) mark the widest or most prominent lateral point of the midface. High, defined cheekbones create structural shadow and are central to diamond and heart face classifications.
Facial Thirds
Classical proportion divides the face into three equal vertical zones: upper (hairline to brows), middle (brows to nose base), and lower (nose base to chin). Deviations signal unique character and affect harmony scores.
FAQ — Jawline
What makes a defined jawline?
A defined jawline has visible angle at the gonial corner, clear separation between jaw and neck, and minimal submental fat obscuring the contour.
Can jawline change with age?
Yes. Skin laxity, bone resorption, and fat redistribution soften jaw definition over time — a key signal in AI age estimation.
How does Smile Tracker measure jawline?
Our Face Analyser uses facial landmarks to map jaw contour and proportion it against face width and height.