You have a triangle face shape when your jaw is the widest point on your face, your forehead is the narrowest, and your cheekbones sit between the two, often ending in a wide or square chin.
This guide gives you the checklist, the measurements behind it, six real examples and the styling logic that widens a forehead narrower than the jaw beneath it. Pear-shaped face and inverted triangle are two other names people search for this same shape, and every measurement below applies to both labels too. Face shape here is a styling heuristic sourced from geometry, never a beauty ranking.
The Short Version
This is the geometry the detector reads, not a style or a look. On a front photo the classifier compares face length against width and the three widths against each other, and the triangle pattern is the combination described here. Hair, expression and camera angle change how a face reads to people; they also change the landmarks, which is why the scan asks for a level, front-facing photo.
How to Tell: The Triangle Face Checklist
A triangle face shape is defined by four measurements, forehead width, cheekbone width, jaw width and face length, and by the ratios between them, not by an outline traced in a mirror. Jaw width sets the reference point on a triangle face, because it is the single widest span on a straight-on photo, wider than both the cheekbones and the forehead. From that widest point, the face narrows moving upward: cheekbones sit at a mid-width point, narrower than the jaw but wider than the forehead, and the forehead itself reads as the narrowest measurement on the face. That upward narrowing, jaw to cheekbones to forehead, is the inverse of a heart face's own order, and is what separates a triangle face from every shape where the widest point sits higher up. Each criterion below checks one part of that pattern, and a face that satisfies most of them belongs in this class even when one measurement sits close to a boundary.
- Jaw width is the widest measurement on the face, wider than both the cheekbones and the forehead.
- Cheekbone width sits at a mid-point, narrower than the jaw but wider than the forehead.
- Forehead width is the narrowest of the three widths, the mirror image of a heart face's widest point.
- Face length sits in the middle of the range, not the measurement that decides this class.
- A chin that reads wide or square, not pointed, the detail that separates triangle from a heart face's narrow point.
How Triangle Is Different From Heart and Diamond
Triangle is most often confused with heart and diamond, because all three classes keep at least one width measurement clearly narrower than the rest. Heart is the exact mirror: a heart face keeps the forehead as the widest point and the jaw as the narrowest, while a triangle face flips that pattern entirely, jaw widest and forehead narrowest. Diamond is the closer mix-up on the forehead: a diamond face also keeps the forehead as its narrowest measurement, but the cheekbones, not the jaw, read as the widest point, notably wider than both the forehead and the jaw. The fastest check across all three compares the jaw directly against the forehead first: a wider jaw with a narrower forehead reads triangle, the reverse reads heart, and a widest-cheekbone reading with a narrow forehead reads diamond.
The AI Face Shape Detector runs this same comparison automatically. Its browser-based landmark mesh measures forehead, cheekbone and jaw width against face length, corrects for head tilt on its own, and applies the same width-order rule to sort a face with the jaw widest and the forehead narrowest into the triangle class. It also prints the margin to the next-closest class, a number a mirror check cannot give you.
The Measurements Behind It
Face shape classification rests on four measurements, forehead width, cheekbone width, jaw width and face length, each taken as a straight span rather than an estimate. Forehead width runs across the widest visible point of the forehead, above the temples. Cheekbone width, the bizygomatic width, runs across the face just below the outer corners of the eyes. Jaw width runs from one gonial angle to the other, the points where the jawline turns up toward the ears; on a triangle face, that span is the widest measurement on the face, wider than the cheekbones above it. Face length runs from the hairline to the chin and does not decide this class either way. A triangle face carries a jaw measurement wider than both the cheekbones and the forehead, with the forehead reading as the narrowest of the three widths. The most common self-measurement error undercounts jaw width, because a tape held flat under the chin misses the actual gonial angle, the point where the jawline turns up toward the ear. This AI facial analysis corrects that automatically: it locates both gonial angles from the landmark mesh itself, on-device, before a single span is measured.
Triangle Faces at a Glance
Six public figures are widely described in style coverage as having a triangle or pear-shaped face, spanning both long and short hairstyles.
- Kelly Clarkson, styled with soft layers that add width above the jaw.
- Queen Latifah, styled with a side-swept fringe and volume at the crown.
- Patricia Arquette, styled with waves that widen at the temples.
- Timothee Chalamet, styled with tousled curls that add width at the crown.
- Tom Cruise, styled with a side part and layering above the temples.
- Rami Malek, styled with a textured crop that keeps width high on the face.
For Men and For Women
The same four measurements define a triangle face shape for every face, regardless of sex: forehead width, cheekbone width, jaw width and face length read the same way and cross the same thresholds. Anthropometric studies that track those four spans by sex find real differences in the raw numbers. One 200-person facial index study measured men's facial height, cheekbone width and overall facial index as significantly greater than women's [1]. The same study found the spread of shape classes across that sample was not significantly tied to sex [1]. Two presentation differences are worth naming on top of that. Jaw muscle mass runs higher on average in men, which adds visible definition to a jaw that already measures widest on a triangle face. A receding or higher hairline, more common in men, can make an already narrow forehead read narrower still, without moving the actual measurement. Neither difference moves the face into a different class on its own.
What Flatters a Triangle Face
A triangle face carries width at the jaw that no other measurement on the face matches, so the styling job runs opposite to a heart face's: add width and volume higher up instead of lower down. Volume added at the forehead and temples, through a fringe with width across the brow, height held at the crown, or a side part that fills out the temple area, brings the narrowest measurement closer to the jaw's width and evens out the taper. The same principle works against the jaw itself: a cut or beard shape that stays close to the jawline, rather than flaring out or adding bulk at the chin, avoids adding more width to the measurement that already reads widest on the face. The changes to avoid run the other way. A chin-length bob or a blunt cut ending right at the jaw repeats its own width instead of countering it, and a style with no volume at the temples leaves the forehead's narrow measurement on full display. A dedicated hairstyle guide for triangle faces is coming; until it publishes, the rule above carries the same logic either way, adding width high on the face and keeping width in check at the jaw.
The four measurement, ratio based method this page uses traces to anthropometric facial index research [1]. That research divides face height by cheekbone width and sorts a sample into phenotype bands, rather than the seven styling classes named here. That is what the evidence says about the classification's own grounding: a measurement method drawn from a research tradition, applied here as a styling heuristic rather than a clinical one. The same source and the same four-measurement grounding apply across every face shape guide on this site, cited once here rather than repeated on each one.
Not medical advice. This page describes a styling classification, not a diagnosis, a clinical measurement, or a ranking of how attractive a face is.