Facial Measurements

A facial measurement is defined by repeatable landmarks, not a visual impression. This series separates linear spans, angles, ratios, and growth questions, then shows the papers behind each definition.

Every guide states the view, landmarks, method, population, and evidence limits. A surface photograph can estimate geometry. It cannot reveal bone biology or turn an unmatched before and after pair into proof of structural change.

Start with the guides below, then read the broader definition of facial dimorphism. If you want the landmarks applied to your own photos, see the Healthmaxxing Solar facial analysis.

• Chin Projection: Pogonion, Profile Balance, and Measurement. How far forward pogonion sits in side profile, bone versus skin, sex cues, camera limits, and how Solar reads it.
• Chin Height: How the Vertical Chin Is Measured. The vertical distance from the lower lip region to menton. Landmark choice, sex and age spread, camera errors, and how Solar reads it.
• Chin Width: How the Mental Region Shapes the Lower Face. The transverse span of the mental region, not jaw width. Landmarks, ratios, dimorphism, soft tissue, and how Solar reads it.
• Lower Face Height Ratio: Subnasale, Stomion, and Menton. Subnasale to menton, and the upper lip to chin split. Landmarks, vertical pattern, age, and how Solar reads it.
• How to Grow Your Radix: Nasion and Suture Traction. What nasion and radix are, how they grow, how to do Suture Traction Therapy at the frontonasal suture, why cyclic force beats a held pull, and the tongue work after.
• Double Break Angle: What the Nasal Profile Measurement Actually Shows. How the nasal bridge changes direction into the supratip and tip. Landmarks, what the number can and cannot tell you, sex cues, and how Solar reads it.
• Nasofrontal Angle: How Forehead and Nasal Root Shape the Profile. The bend at nasion between your forehead and nasal dorsum. How you measure it, why values vary, how it changes with age, and how Solar reads it.
• Nasolabial Angle: Columella, Upper Lip, and Profile Balance. The angle at subnasale between your columella and upper lip. Landmarks, common ranges, sex differences, what throws the number off, and how Solar reads it.
• Nasal Tip Projection: Goode Ratio, Landmarks, and Profile Balance. How far the nasal tip extends from the face. The Goode ratio, other methods, range limits, camera errors, and how Solar reads the profile.
• Nasomental Angle: Nose and Chin Balance in Side Profile. You connect nasion, nasal tip, and chin. Smaller usually means a stronger nose relative to the chin. The same number can come from either end. Camera distance lies. Solar splits the two.
• Facial Convexity Angle: Midface and Chin Profile Measurement. How your forehead, midface, and chin sit in one profile bend. Glabella, subnasale, pogonion. Jaw relationship moves it. Solar reads the parts, not just the combined angle.
• Ricketts E Line: Lip Position Between Nose and Chin. You draw a line from nasal tip to soft tissue chin. Lip position is the distance to that line. Nose and chin move the reference even when the lips stay still. Solar splits the parts.
• Labiomental Angle: Lower Lip, Chin Fold, and Profile Shape. The bend between your lower lip and chin at the labiomental fold. Smaller is deeper and sharper. Larger is flatter. Muscle tension fakes a deep fold. Solar reads it with the chin.
• Facial Thirds: How Vertical Face Proportions Are Measured. Facial thirds cut your front view at trichion, glabella, subnasale, and menton. The landmarks, the evidence, camera limits, and how Solar reads them.
• Facial Fifths: Eye Spacing, Nose Width, and Face Balance. Facial fifths cut frontal width through your eye corners and outer contours. The real landmarks, population evidence, image errors, and how Solar reads them.
• Facial Width to Height Ratio: Measurement, Meaning, and Limits. Facial width to height ratio compares cheekbone breadth with upper face height. Competing definitions, age and body size confounds, and how Solar reads the ratio.
• Canthal Tilt: How You Measure Eye Corner Inclination. The angle from your inner eye corner to the outer one. How to mark it, what positive and negative tilt mean, how age and population change the number, and how Solar reads it.
• Eye Aperture: How You Measure Vertical Palpebral Fissure Height. The visible vertical opening between your eyelid margins. How to measure it, what expression and age do to the number, population norms, and how Solar reads it.
• Intercanthal Distance: How You Measure the Space Between the Eyes. The span between your inner eye corners. How to use ratios, how population and sex change the number, camera errors, and how Solar reads spacing.
• Palpebral Fissure Length: How You Measure Horizontal Eye Length. The span from your inner eye corner to the outer one. How to mark it, which ratios to use, how age and population change the number, and how Solar reads it.
• What Is the Gonial Angle? Normal Range and Jaw Angle Measurement. The gonial angle of the mandible is the jaw corner, measured articulare-gonion-menton in profile. Normal range, gonion angle confusion, sex and age evidence, and why it is not jaw width.
• What Is Jaw Width? How It's Measured and Why It Reads Square. Jaw width is bigonial width, the go-go span between the jaw angles. How it is measured, why it reads square, and what is actually shown for DHT, T3, progesterone, and suture traction.