A square face has a forehead, cheekbones and jaw of nearly the same width, a length only a little greater than that width, and a visible angle at the jaw. Measured, that means a forehead and jaw at about 90 percent of the cheekbone width or more, and a length-to-width ratio between 1.10 and 1.30. Check yours with the Face Shape Calculator: it takes four measurements and a minute.
Face shapes are a styling framework, not an anatomical category. “Square” describes the outline of a face at a glance, which is the thing a haircut or a pair of frames interacts with.
How to tell if you have a square face
Start with the widest point, then the length, the same order as the face shape chart. Measure forehead (A), cheekbones (B), jaw (C) and face length (D) as the measuring guide shows, then divide by B.
| Ratio | Square: most typical range | What it means |
|---|---|---|
| A/B (forehead) | 0.92–1.04 | Forehead about as wide as the cheekbones |
| C/B (jaw) | 0.90–1.00 | Jaw nearly as wide as the cheekbones |
| D/B (length) | 1.10–1.30 | Face only a little longer than it is wide |
Widest point: nowhere in particular. The three widths sit within a narrow band, so no part of the face clearly dominates. That is the first signal.
Length: short. A D/B ratio in the square range means the face is barely longer than it is wide. If the widths match but the ratio climbs past 1.50, the face reads oblong instead.
The corner. The calculator works from widths, so the jaw angle is a check you make by eye. Run a finger along your jaw from the ear toward the chin: on a square face there is a clear turn below the ear, and the jawline runs fairly straight before it curves to the chin.
A typical square face: forehead 13.2 cm, cheekbones 13.5 cm, jaw 12.8 cm, length 16.2 cm. The ratios are 0.98, 0.95 and 1.20, and the calculator scores it 100 for square and 68 for round.
Square or round, oblong or triangle?
Three neighbors share part of the square profile.
- Round has exactly the same length range. The difference is the jaw: a round jaw is narrower (C/B typically 0.80 to 0.92) and has no defined angle. If your jaw ratio sits around 0.90, you are on the border, and round vs square walks through the tie-breakers.
- Oblong has the same even widths but is clearly longer, with D/B from 1.50 up. A square face that measures long is often called rectangle.
- Triangle has a jaw at or beyond the cheekbones but a clearly narrower forehead, under about 0.90 of the cheekbone width. If your forehead is noticeably narrower than your jaw, compare with the triangle entry in the chart.
Hair for a square face
The rule that matters is where the ends and the volume land relative to the jaw. A horizontal line, whether a blunt hem or a ridge of volume, makes the face read wider wherever it sits. On a square face the widest lower point is the jaw, so the line belongs above it or below it, not on it.
That is why soft layers that begin around the cheekbones work, why an off-center part helps, and why long curtain bangs that open at the cheekbones frame the face without boxing it in. The full breakdown, including which lengths and textures work, is in hairstyles for a square face. For specific cuts, see bangs by face shape, where a bob should end and the 2.25-inch test for short hair.
Glasses for a square face
Two things decide a frame: its width and its line. Aim for a frame close to your cheekbone width, so the outer edges line up with the widest part of the face rather than stopping short of it or sticking out. Glasses frame size explains how to turn your B measurement into a frame width.
For the line, curves contrast with the corners: round, oval and soft cat-eye shapes all break up a face built from straight lines. Heavy rectangular frames repeat the jaw and make the whole face read more geometric, which some people want and some do not. Either is a choice, not a mistake. The sunglasses chart applies the same logic to aviators, trapezoid frames and oversized lenses.
Earrings, necklines and brows
The same horizontal-line logic carries through. Earrings that end at the jaw in a wide horizontal shape add width there; longer drops and curved shapes add length and contrast. The details by face shape are in earrings for your face shape. Scoop and V necklines draw a curve or a point below a straight jaw, and necklines for your face shape adds neck length and bust to the decision.
For brows, a softly rounded arch suits a square face better than a sharp angle, which would repeat the jaw corner. The brow shape guide shows how to map yours.