How to Know Your Face Shape: The Mirror Trick, the Ruler Method and a 7-Shape Chart

The short answer to how to know your face shape: pull your hair back, compare four measurements (forehead width, cheekbone width, jaw width and face length), and answer three questions. Which width is the biggest? Is your face clearly longer than it is wide, or close to even? Is your jaw angular or softly curved? Those answers put almost everyone into one of seven shapes: oval, round, square, heart, diamond, oblong (also called rectangle) or triangle.

You need about ten minutes, a mirror and a ruler or tape measure. Precision to the millimeter does not matter, because the shape comes from how the numbers relate to each other, not from the numbers themselves. Below are three ways to get those numbers, a chart for reading them, the mistakes that most often lead people to the wrong answer, and a photo shortcut if you would rather skip the measuring.

One thing worth saying before you start: a face shape is a description, not a grade. Beauty guides often call oval the "ideal" shape, mostly because it is balanced and easy to cut hair for. That is a convenience for stylists, not a ranking of faces. Knowing your shape is useful for practical reasons: choosing a haircut, a pair of glasses, a beard style or a camera angle that does what you want it to do.

What you need before you figure out your face shape

• A mirror you can stand square to, at roughly eye level, in good front light (a window in daylight is ideal).
• A ruler or a soft tape measure. Two pencils help if a friend is measuring you.
• Something washable to draw on the mirror with: a dry-erase marker, an old lipstick or a bar of soap.
• A hair tie, clips or a headband to get every strand off your forehead, temples, cheeks and jaw.
• Your phone, for notes and for the photo method.

Keep a relaxed, neutral face throughout. A smile pushes the cheeks up and outward, and clenching your teeth makes the jaw muscles bulge, so both change the widths you are trying to read. Take glasses off, and if you have a full beard, read the section on beards below before you trust any jaw measurement.

Method 1: Trace your outline in the mirror

This is the fastest method and it is surprisingly good at showing the overall silhouette.

1. Stand about an arm's length from the mirror with your shoulders square and your chin level, eyes looking straight at their reflection.
2. Close one eye. This keeps your viewpoint fixed so the outline does not drift as you move.
3. Starting at the center of your hairline, trace the edge of your face down one side to the chin, then back up the other side. Skip the ears and ignore hair. Follow the edge of the skin and, along the bottom, the jawbone.
4. Step back and look at the outline on its own. Is it long and narrow, nearly as wide as it is long, wide at the top and narrow at the chin, or widest in the middle?
5. Snap a photo of the tracing before you wipe it off, so you can compare it with the chart further down.

Tracing is strong on silhouette and on the chin (pointed, rounded or flat). It is weaker at separating oval from oblong, because length is hard to judge by eye. That is what the measurements are for.

Method 2: Measure your face with a ruler or tape

What you want are four straight-line distances.

Widths are easiest with two people. You hold a pencil upright against each side of your face at the level being measured, keeping the pencils parallel, and a friend measures the gap between them. That gap is a true straight-line width. Measure each one twice and use the average.

A warning about one popular shortcut: many guides tell you to wrap a soft tape around the face, or to measure from the chin to the corner of the jaw and double it. A curved line is always longer than a straight one, and the doubled jawline in particular comes out longer than the cheekbone width on almost everyone, which makes the jaw look like the widest point when it usually is not. If you use a tape, pull it taut from point to point and measure every width the same way.

Method 3: Measure a photo instead

If you are alone, a photo gives you straight-line widths without any pencils.

1. Have a friend take the photo from about five or six feet away with the rear camera, zoomed to around 2x if your phone allows it. Alone, prop the phone at face height and use the timer.
2. Hair back, ears visible, neutral expression, eyes into the lens, head straight with no tilt. The lens should be level with your nose.
3. Open the photo, zoom in until the face fills the screen, and measure the four distances with a ruler against the screen or a markup tool.

The units do not matter here. You only need the ratios between the numbers, so a measurement in screen centimeters works as well as one in real inches.

How to tell your face shape from the numbers

This is the step that actually answers how to tell your face shape. With four numbers or a tracing in front of you, answer three questions.

1. How long is the face compared with its width? Divide face length by the widest width (usually the cheekbones). As a rough rule of thumb, a result close to even, up to about 1.3, points to round or square. Around 1.5 is typical of oval, heart and diamond. Clearly more than that, around 1.6 and up, points to oblong. These are working guidelines, not hard borders, and a face at 1.4 is honestly in between.

2. Where is the face widest? Forehead, cheekbones, jaw, or all three roughly equal?

3. What do the jaw and chin look like? Sharp corners below the ears or a soft curve? A pointed, rounded or flat chin?

Now match your answers to the chart:

Some guides treat oblong and rectangle as one shape and others split them by the jaw. For choosing a haircut the advice is almost the same, so do not worry about which label you use.

What face shape do I have if I fit two?

If you keep asking what face shape do I have and the answer comes out as two, that is normal rather than a failed test. Most people land between two shapes. If your length says oval but your jaw has real corners, you are oval leaning square. If your proportions are even but the chin is pointed, you are round leaning heart. Common blends are oval-oblong, round-square, square-oblong and heart-diamond.

The practical fix: read the advice for both shapes and follow the one that matches your strongest feature, the thing people notice first. That might be a strong jaw, prominent cheekbones or the length of the face.

Common mistakes that give the wrong answer

Measuring to the wrong hairline

Face length runs to your natural hairline, where the hair actually grows from, not to where your bangs fall. If your hairline has receded at the temples or the front, measure to where it sits now, and note it separately: it changes which haircuts suit you but does not change your bone structure. A widow's peak adds a point in the middle; on its own it does not make you heart-shaped, so check the forehead width too.

Tilting your head, or shooting from above or below

Tipping your chin up makes the forehead look smaller and the jaw heavier. Tipping it down does the opposite. A camera held above you makes the forehead look bigger and the chin smaller, which reads as heart; a camera below you makes the jaw look broader, which reads as square or triangle. Keep the lens level with your nose and your chin level with the floor.

Trusting a close-up front-camera selfie

A phone's front camera is a wide-angle lens, and at arm's length it exaggerates whatever is closest to it. The nose and the center of the face look bigger, and the sides of the face fall away, so the face tends to look narrower and longer than it is. Shoot from farther away with a little zoom, or ask someone else to take the photo.

Counting hair, a beard or an expression as face

Hair volume at the temples, a full beard or a big smile all change the outline you see. A full beard can make a round face read square or oblong, which is exactly why beards are useful for styling, but it is not your face shape. Feel for the angle of the jawbone with your fingertips and measure the bone, not the beard.

Deciding from a single feature

A pointed chin alone does not make you heart-shaped, a strong jaw alone does not make you square, and full cheeks alone do not make you round. Plenty of oval faces have full cheeks. Use all three questions together.

Assuming the answer is fixed forever

Adult bone structure is stable, but the soft tissue over it changes with weight and age, and your hair and beard change how the outline reads. If your face has changed noticeably, measure again.

The shortcut: a face shape test from one selfie

If you would rather not juggle pencils, a face shape test that reads a photo makes the same comparison faster, and it is a good cross-check on your hand measurements. The Face Shape Detector on Baeseek works from one front-facing selfie. You sign in, pick the photo, and the analysis runs in your browser, so the file is never sent to a server or stored.

It places 68 landmarks along your jawline, cheekbones, brows and chin, works out face length plus jaw and forehead width relative to your cheekbones, and compares those ratios with each shape. What you get back:

• Your shape and a percentage match, from six options: oval, round, square, oblong, heart or diamond.
• A score for every one of the six shapes, so you can see when a result is a close call and which shape came second.
• The measured landmarks drawn over your photo, so you can see exactly what was measured.
• A few well-known people often described as having the same shape.
• Three hairstyle ideas, three glasses styles and two photo-angle tips for your shape, each with a one-line reason.

One limit to know: triangle is not one of its six results. If your measurements clearly show a jaw wider than your forehead, the detector gives you its nearest match (most likely square or round), so let your hand measurements break the tie. The same photo rules from the mistakes section apply: hair tucked behind the ears, eye-level camera, even light from the front and no head tilt.

What to do once you know your face shape

The point of all this is choosing things that balance your proportions, or that play up the feature you like most. A compact starting guide:

For beards, the same logic applies: a beard kept short on the cheeks and a little longer at the chin lengthens a round face, a softer, rounder beard line takes the edge off a very square jaw, and some fullness at the chin balances a narrow chin on a heart or diamond face.

Your shape also tells you which camera angles to use in photos. A round face usually looks more defined with the camera slightly above eye level and the chin down a touch; an oblong face looks better with the lens level rather than above. Once you have a straight-on selfie you like, the AI dating photo improver can turn it into a polished profile picture with better lighting and a cleaner background while keeping your face, which is handy when your camera roll is all bathroom-mirror shots.