FORMA FEATURE / EAR & NECKUnder-chin & neck: measurements, ratios, and research
The transition from the underside of the chin to the front of the neck. Chin projection, posture, skin, fat, and deeper anatomy all influence its contour. This page separates published measurements from interpretation, preference experiments, and community speculation.
What under-chin & neck means
Use the study’s tangent construction along the submental and anterior neck contours in natural head position. This is not a direct measurement of hyoid position.
Facial measurements only become comparable when the view, head position, soft-tissue landmarks, and endpoint definitions are held constant. A number copied from a profile photograph is not interchangeable with a value measured from a clinical scan or a front-facing portrait.
Official measurements, ratios & competing claims
Practical takeaway
A clear turn from under-chin to neck is the study-backed reference.
Use the preferred angle below with its stated tangent method. Read the transition in natural head position alongside chin projection.
What changes the answer
A less projecting chin shortens the visible under-chin span. Posture, soft-tissue fullness, skin, and deeper neck anatomy also affect the contour; extending the neck can make a photograph look sharper without changing anatomy.
Use these ranges to ask a better question about proportion—not to grade a face or choose a procedure by number alone. A qualified clinician still needs to examine function, tissue, skeletal structure, and your goals in person.
Connected facial features
Read or start under-chin & neck discussions · Explore the interactive atlas