Free tool · runs in your browser
Jawline Test
Is your jaw actually weak, or is it puffiness? Symmi measures the angle, the width and the chin from a straight-on photo, then tells you which readings are bone and which ones a routine can move.
Drop a photo, paste one, or choose a file
Straight-on, whole face visible, even light. JPG, PNG or WebP.
Runs in your browser. Your photo never leaves your device.
How it is measured
Angle, width, chin. Three things a jawline is.
From a front view the tool measures the jaw angle at the gonion (where the jaw turns toward the chin), the width across the jaw as a fraction of the widest part of the face, the width across the lower jaw near the chin, and where the chin point sits relative to the midline. Each is compared with the band that reads as defined on most faces.
- Jaw angle
- Angle at the chin between the two jaw corners. 108° to 122° reads as defined; 122° to 128° reads broad; over 128° the jaw slopes into the neck; under 108° the jaw reads sharp and narrow.
- Jaw : face width
- Jaw width over face width. 0.72 to 0.84 is the typical range on a front view; over 0.84 reads square.
- Lower jaw : face
- Width near the chin over face width. Shows taper: too low reads pointed, too high reads boxy.
- Chin offset
- Left or right of the brow midline, as a percent of face width. Over 1.5 percent is usually noticed.
- Chin height
- Lower lip to chin point as a share of the lower third (nose base to chin). 60 to 72 percent is typical; short chins read as recessed on a front view.
Measure it yourself
How to check your jawline yourself
The jawline readings are very sensitive to how you hold your head, so the photo matters more than the ruler.
- 1Take a straight-on photo at eye level, chin level (not tucked, not raised), jaw relaxed and lips together.
- 2Mark both jaw corners (where the jaw turns toward the chin, below the ears) and the chin point.
- 3Jaw angle: measure the angle at the chin between the lines to the two jaw corners.
- 4Jaw width: measure between the two jaw corners and divide by the face's widest width, cheekbone to cheekbone.
- 5Retake the photo with the chin a little raised and compare. Several degrees of difference is normal, which is why one level photo beats many angled ones.
Skip the ruler: the free tool above does it from one photo in about 30 seconds ↑
What's normal
What a defined jawline measures
- Jaw angle (at the chin)
- Typical range: 108° to 122°: defined
- Outside the range: 122° to 128° broad; over 128° slopes into the neck; under 108° sharp and narrow
- Jaw ÷ face width
- Typical range: 0.72 to 0.84
- Outside the range: Over 0.84 reads square
- Chin height (share of lower third)
- Typical range: 60% to 72%
- Outside the range: Shorter reads as a recessed chin on a front view
- Chin offset from the midline
- Typical range: Under 1.5% of face width
- Outside the range: Larger offsets are usually noticed
Puffiness, submental fat and head pitch can move the jaw angle by several degrees. Bone does not change; the soft tissue on it can.
Sources
What this is based on.
The measurement and its reference ranges come from published research. Studies use different methods and populations, so compare your number with the range shown on this page rather than with other tools.
- 1.
Farkas LG, Katic MJ, Forrest CR, et al. (2005). International anthropometric study of facial morphology in various ethnic groups/races. Journal of Craniofacial Surgery. PubMed 16077306
Jaw width and lower-face proportions measured across ethnic groups.
- 2.
Little AC, Jones BC, DeBruine LM (2011). Facial attractiveness: evolutionary based research. Philosophical Transactions of the Royal Society B. PubMed 21536551
Review of research on facial masculinity, including jaw shape, and attractiveness.
- 3.
Kartynnik Y, Ablavatski A, Grishchenko I, Grundmann M (2019). Real-time facial surface geometry from monocular video on mobile GPUs. arXiv. arXiv:1907.06724
The face-mesh model that places the 468 surface landmarks this tool measures from.
- 4.
Ablavatski A, Vakunov A, Grishchenko I, et al. (2020). Real-time pupil tracking from monocular video for digital puppetry. arXiv. arXiv:2006.11341
The iris model that adds 10 eye landmarks (478 in total), used for pupil-based reference lines.
Our own data: how much each reading moves when the same face is photographed again is published on the methodology page. How we choose sources.
Related tools
FAQ
Can a jawline be trained?+
The bone cannot. What sits on it can: submental fat, fluid, and the platysma and masseter tone that define the edge. A puffy lower face can move the jaw angle reading by several degrees. The Symmi app scans, then routes gua sha, ice and chin work into a daily three-move routine and rescans to show the difference.
Does chewing gum help?+
Masseter growth widens the jaw angle area slightly over months; it does not sharpen the line under the chin. See the article below for the six-month numbers.
Why does my jaw look wider in selfies?+
Phone lenses at arm's length distort the lower face. Measure from a photo taken at arm's length or further, straight on, and compare like with like.
Is my photo uploaded?+
No. The measurement runs in your browser and your photo stays on your device.
One reading here.
Nineteen in the app.
A controlled scan, every reading against its ideal band, bone vs trainable, a plan, and a 3D model on Face ID iPhones.