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Heart vs Diamond Face

Forehead width is the key difference between heart and diamond faces. Both taper to a narrow chin, so the tell sits up top. See which one you have in two steps.

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Forehead width separates a heart face from a diamond one: a heart carries its broadest line across the forehead, while a diamond narrows there and peaks at the cheekbones instead. Both then taper to a narrow jaw and a pointed chin, which is why the top third of the face is where the answer lives.

The pair looks alike from the jaw down. Each closes to a slim, tapered chin, each keeps a narrow mandible, and each reads as a shape that comes to a point at the base. Trace either from below and you would struggle to name it. The split sits up top, at the brow.

A heart puts the forehead at or above the width of the cheekbones, and it often adds a widow's peak at the hairline. A diamond does the reverse. Its forehead is the narrowest of the three horizontal lines, its cheekbones sit clearly widest, and its jaw tapers back in. Read across the forehead, cheekbones and jaw in order and the two outlines separate at the first line.

The neoclassical facial canons treat those three widths as the frame for the upper face, and Google MediaPipe Face Mesh fixes each landmark from 468 points inside your browser, with nothing sent to a server.

Below: the wide-browed heart, the cheekbone-peaked diamond, forehead width as the deciding measure, the two shapes compared row by row, reading your own brow from a photo, why a heart reads as a diamond, and where the hair and makeup plan flips. The face shapes hub holds the full set.

The heart outline and its forehead width

Heart proportions lead with the brow. The forehead marks the widest horizontal line, wider than the cheekbones, then the outline narrows steadily from there to a slim, pointed chin. The widow's peak at the center of the hairline shows up often enough to count as a signature, though it is not required.

Width falls as the eye travels down. Cheekbones sit a little inside the forehead, the jaw pulls in further, and the chin finishes as the narrowest point of all. That top-heavy taper gives the heart face its inverted look, broad above and slim below.

The chin is sharper than a round or oval base, coming close to a point rather than a curve. So a heart reads as width at the hairline resolving down to a single tip. Hold that image against the diamond and the contrast is the forehead.

The diamond outline and its cheekbone width

Diamond proportions lead with the cheekbones. The cheekbones stand clearly wider than both the forehead and the jaw, so the face bulges at the middle third and tapers at both ends. A narrow brow and a narrow, tapered jaw sit above and below that central peak.

The forehead is the tell against a heart. On a diamond it is the smallest of the three widths, not the largest, which flips the top of the outline. The hairline tends to sit narrow and even, without the wide sweep or widow's peak a heart carries.

Below the cheekbones the two shapes converge again. The diamond face narrows to the same pointed chin a heart carries, and that shared base is why the jaw view fools people. Look up, not down, and the peaked cheekbones over a slim forehead give the diamond away.

Forehead width as the deciding measure

One comparison ends the debate. Set the forehead width against the cheekbone width. If the forehead matches or beats the cheekbones, the shape is a heart. If the cheekbones clearly win and the forehead reads narrowest, it is a diamond.

The jaw contributes nothing here. Both shapes narrow to a slim mandible and a pointed chin, so a reading taken at the base returns the same answer for either. The discriminating line runs across the brow.

That widow's peak, when present, reinforces the heart call, since a diamond hairline rarely carries one. But the peak is a bonus signal, not the measure. The width relationship between the top line and the middle line decides the shape on its own, and everything else confirms or hedges. Read the forehead against the cheekbones first.

Heart and diamond compared row by row

ReadingHeartDiamond
Widest pointForeheadCheekbones
Forehead vs cheekbonesEqual or widerClearly narrower
JawNarrow, taperedNarrow, tapered
ChinPointedPointed
HairlineWidow's peak commonUsually even

The bottom two structural rows match, which is the trap. Jaw and chin taper the same way on both, so a reader working from the mouth down gets no signal. The top two rows carry the verdict. A heart's forehead ties or tops the cheekbones; a diamond's forehead loses to them by a clear margin. Read the two upper rows and skip the rest.

Reading your forehead width from a photo

A front-on photo answers it, as long as the whole hairline shows. Pin or slick every strand back so the true edge of the forehead is visible, face the lens at eye level, and hold a relaxed expression.

  1. Mark the forehead width. Temple to temple at the broadest point of the brow.
  2. Mark the cheekbone width. Across the cheekbones at their widest.
  3. Compare the two. Forehead wider or equal points to heart, forehead clearly narrower points to diamond.

Keep hair out of the frame entirely. A few strands at the temple hide where the forehead truly ends and can shrink a heart's brow into a diamond reading. Check the hairline for a central point while it is exposed. Or let the detector place the 468 landmarks and compare the widths for you.

Why a heart reads as a diamond

The mix-up traces to the shared lower face. Both outlines taper to the same pointed chin, so a glance that starts at the jaw finds identical geometry and assumes the rest matches too. The forehead, where the shapes truly divide, gets overlooked.

Three things blur the brow.

  • Hairstyle. A fringe or side-swept front hides the forehead edge, erasing the one line that separates the two.
  • Widow's peak. A strong central point can read as a narrow forehead in a quick look, mislabeling a heart as a diamond.
  • Photo angle. A three-quarter turn compresses the cheekbones and can make a heart's brow look narrower than it is.

A face with a forehead and cheekbones close to equal width sits between the labels. That borderline is real variation, and the peak often becomes the tiebreaker.

How the styling goals diverge for hair and makeup

The distinction changes the whole plan. A heart carries too much width up top, so the goal is to broaden the jaw and soften the brow: chin-length layers, a curtain fringe to cut forehead width, and volume low near the mandible. Weight belongs at the bottom.

A diamond needs the opposite. Its narrow forehead wants filling and its wide cheekbones want breaking, so a fringe that broadens the brow, layers stopping below the cheekbone, and texture around the jaw all help. Hairstyles by face shape sets out the cuts, and makeup by face shape reverses the contour map: a heart shades the forehead sides, a diamond highlights them.

Same pointed base, mirrored instructions up top. Fix the forehead reading and the rest of the plan writes itself.

Forehead width divides the two tapered outlines, a heart at or above the cheekbones and a diamond clearly below them. The heart outline leads with a broad brow, the diamond outline peaks at the cheekbones, forehead width against the cheekbones is the deciding measure, the row-by-row table exposes two matching lower rows and two deciding upper ones, one clean front photo compares your own widths, a fringe and a widow's peak and a turned angle explain the mix-ups, and the hair and makeup goals diverge between broadening a jaw and filling a narrow brow. Read the top third first, then confirm with the hairline. Send a level front photo through the detector and let the landmarks measure the brow.

Start with your face shape

Most styling decisions follow from one measurement. Run the detector, then work outward from the result.

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