Compare the measurable middle facial third to the lower facial third with marked guides. Check forehead, midface, and chin proportions in seconds with zero cloud uploads.
For optimal measurement: hair pulled away from the forehead/hairline, face upright, neutral expression, and chin level.
The rule of facial thirds divides human cranial height into three equal vertical heights: the upper third from the hairline (trichion) to the brow (glabella), the middle third from the brow to the base of the nose (subnasale), and the lower third from the base of the nose to the tip of the chin (menton).
Neoclassical artists and modern maxillofacial surgeons use this canon to assess sagittal balance. In an ideal classical face, each sector constitutes roughly 33.3% of the total measurable facial height.
Furthermore, the lower third has its own internal harmony: the distance from the nose base to the upper lip closure (stomion) ideally accounts for one-third, while the distance from the mouth to the chin accounts for the remaining two-thirds.
Everything you need to know about facial thirds and facial balance.
1. Upper third: Hairline (trichion) to between the eyebrows (glabella). 2. Middle third: Brow to base of the nose (subnasale). 3. Lower third: Base of the nose to bottom of the chin (menton).
Test your rule of five, nasal index, eye spacing, and golden ratio.
Upload a front-facing photo and see how evenly your face width divides into the classic five vertical facial sections.
Measure nose width relative to nose length with marked alar and bridge-to-tip landmarks.
Measure pupil spacing relative to overall face width with a marked facial-width guide.
Check classic face, nose, mouth, and lower-face proportions in one free marked result.
