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The Face Shape Detector
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Beard Styles by Face Shape

Pick a beard by proportion: hair below the mouth adds length, hair on the cheeks adds width. Named styles for all seven shapes, plus neckline placement.

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Beard styles by face shape (facial hair shaping) work through one mechanism: hair grown below the mouth adds apparent length, and hair grown across the cheeks adds apparent width. Choose which of those two you need, and the style selects itself.

The quantities are small. Stubble held at 3 to 5 millimeters changes almost nothing about the outline while hiding density gaps. A short boxed beard at 10 to 15 millimeters adds around a centimeter under the chin. A full beard grown out past 5 centimeters can move a classification a whole category. And no beard can be judged before four full weeks of growth, because coverage rates differ across cheek, chin and mustache.

The outlines being modified are the standard seven. A round reading holds length and cheekbone width within a few percent. A triangle carries the jaw as its widest measurement, tapering up to a narrower forehead. Those two need opposite beards.

Google MediaPipe Face Mesh takes the measurements from 468 landmark points in your browser, and the face shapes reference sets out every category.

Below: the mechanism with a grid of named styles, then one section per outline, then the two boundary lines that decide whether any beard reads deliberate, then patchy growth and a receding chin.

What facial hair adds, and where

Growth beneath the mouth extends the lower third downward. Growth across the cheeks pushes the mid-face outward. Every named style is a ratio between those two directions.

A style that is long at the chin and short on the cheeks builds a vertical block under the face. A style kept short below the mouth and full on the cheeks builds a horizontal band. One trimmer produces both.

StyleWhat it coversWhat it changesBest on
StubbleEverything, at 3 to 5 mmDefinition without bulkSquare, oval
Short boxed beardCheeks, chin, upper lip, edges definedSquares off a soft lower thirdOval, round, heart
Full beardCheeks to neckline, unshaped lengthAdds width and length togetherHeart, oblong at short length
GoateeChin and upper lip onlyLengthens, narrows the lower thirdRound, square
Van dykeChin and mustache, disconnectedVertical emphasis, no cheek weightRound, triangle
Extended goateeChin, mustache, a strip along the jawProjects the chin forwardWeak or receding chins
Chin strapA narrow line along the mandibleTraces the existing cornerRarely useful
DucktailFull cheeks, tapered to a point belowAdds length at the point onlyRound, square

Oval: a beard that changes nothing

Oval proportions taper gently and need no adjustment, so the aim is a beard that keeps them. Heavy stubble or a boxed beard held under 15 millimeters both qualify.

The trap is length. Grow past that and the bottom third stretches, which is how an oval face ends up reading oblong in photographs. Keep the sides trimmed close to the same length as the chin and the proportion holds.

Round: length under the chin

Round faces gain most from vertical growth. Grow the chin section noticeably longer than the cheeks, keep the upper edge set high, and let the outline finish in a point or a squared block beneath the mouth.

A goatee, a van dyke or a ducktail all do this. What fails is one even length all around, which wraps a curve around a curve and widens the reading further. The round page explains the measurement.

Square: taking the edge off a corner

Square outlines already carry a hard mandible corner, so hair should soften it. Even stubble in the 3 to 5 millimeter band does that better than anything longer, because it blurs the edge without redrawing it.

If you want length, keep the beard slightly fuller below the chin, shorter at the corners, with a rounded lower outline. Skip the chin strap and any squared-off shape, both of which stack a second hard line on the one you have. See the square page.

Heart: filling out a narrow jaw

Heart proportions run widest at the brow and narrowest at the chin, so a beard is genuinely corrective here. A full beard, grown heavier along the jaw and the sides than at the point, broadens the lower third and rebalances the outline.

Set the upper boundary low, near the base of the cheekbone, so nothing adds width up top. A goatee does the opposite of what this outline needs, concentrating mass on the narrow point. The heart page covers the taper.

Diamond: width along the mandible

Diamond faces peak at the cheekbones between a narrow brow and a narrow chin. Facial hair should run out along the jaw and fill the chin, which brings the jaw closer to the cheekbone measurement.

A boxed beard with its top line set low works, and so does a full beard kept even. Stubble that stops high on the cheek frames the cheekbone and emphasizes the measurement you are balancing against. More at the diamond page.

Oblong: wide, never long

Oblong outlines run long already, so length is the enemy. Grow full cheek coverage, set the top line high so hair occupies horizontal space, and hold overall length short.

Anything past 2 centimeters below the chin extends a run already too long. A mustache with heavy stubble adds a horizontal without adding height. The oblong page has the ratios.

Triangle: keeping the corners quiet

Triangle faces carry width where a beard usually adds it, so restraint at the sides is the whole instruction. Trim close along the mandible corners and grow slightly longer directly beneath the chin, which lengthens rather than broadens.

A van dyke suits this outline for the same reason: it puts hair on the chin, none on the cheek. Long sideburns and full cheek coverage compound the widest measurement you have. See the triangle page.

The neckline and the cheek line

Two boundaries decide whether a beard reads deliberate or neglected, and they matter more than length does.

The lower boundary belongs on the neck, not on the jawbone. Place it one to two finger widths above the Adam's apple, then curve it upward to a point just behind each earlobe and shave everything beneath. Set it on the bone instead and the beard becomes a strap floating above bare skin. Leave it entirely and the jaw disappears the other way.

The upper boundary does the opposite job. A high line makes a beard look denser and a face rounder. A low line exposes more cheek, lengthens the outline and brings the cheekbone forward. Pick the direction your proportions need, then cut lower than feels right, since you can remove more next week but cannot replace it.

Working with the growth you have

Patchiness follows follicle distribution, and no product redistributes follicles. Pick a style that does not need the missing area.

  • Sparse cheeks with a dense chin. Drop the upper edge and let the shape become a goatee, a van dyke or a compact box. Those read as chosen.
  • Gaps at the mouth corners. Grow surrounding hair to 8 to 12 millimeters so it lies across the gap, then trim everything to one length so the eye stops comparing regions.
  • Thin coverage overall. Hold the whole beard at stubble length, where no hair is long enough to reveal the skin behind it.
  • One side denser. Trim to the sparser side. Uneven density shows more than a slightly shorter beard does.

Give any attempt four weeks before you judge it.

Grooming a receding or weak chin

A chin sitting back relative to the lower lip shortens the bottom third and softens the whole lower outline. Hair is the most direct correction available.

Grow it longest directly beneath the chin, tapering shorter toward the ears. That gradient projects the chin forward in profile. An extended goatee does the same at less bulk. Keep the lower boundary crisp, since a soft one removes the contrast that makes the projection visible.

Avoid a single even length everywhere, which blends chin into neck, and avoid tracing the existing outline with a narrow strap, which confirms it. Haircut choices support the same goal, and the men's face shape page pairs each row with a cut and a frame.

Facial hair shaping, then, is a decision between length below the mouth and width across the cheeks. The style grid ranked eight named shapes against that single split. Oval asked for a beard that changes nothing, round for length under the chin, square for a softened corner, heart for a filled jaw, diamond for mandible width, oblong for width without length, and triangle for quiet corners. Two boundary lines then decided whether the result reads deliberate, patchy growth pointed toward styles that skip the missing area, and a receding chin called for length directly beneath it. Measure the outline first with the detector, then grow for four weeks before judging anything.

Start with your face shape

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

Your photo never leaves your device.