Guides
How to Determine Your Face Shape
Your face shape is decided by four measurements: forehead width, cheekbone width, jawline width, and face length (hairline to chin). Compare which is widest and how your length relates to your width, and you'll land on one of seven shapes: oval, round, square, oblong, heart, diamond, or triangle.
You can get there three ways: measure yourself with a tape measure, compare a straight-on photo against reference shapes, or let a face shape detector identify it for you from one photo. This guide walks through all three, plus how to read your numbers once you have them.
Method 1: Measure it yourself (with a mirror or tape measure)
This is the most transparent method, since you see every number yourself. Use a flexible tape measure or a piece of string plus a ruler, and pull your hair back off your face before you start.
- Measure your forehead width. Find the widest point, roughly halfway between your eyebrows and your hairline, and measure straight across.
- Measure your cheekbone width. Start just below the outer corner of one eye, at the top of the cheekbone, and measure straight across to the same point on the other side.
- Measure your jawline width. Measure from just below one ear along the jaw to the tip of your chin, then double that number (it's more accurate than trying to curve the tape around the whole jaw), or measure corner to corner if you can keep the tape straight.
- Measure your face length. Run the tape from the center of your hairline straight down to the bottom of your chin, with your head level and facing forward.
- Compare the four numbers. Write them down, identify the widest one, and check whether your face length is clearly greater than your width or close to equal.
Measure each line twice and average the two results: a single measurement can be thrown off by tape angle or posture (1-800 Contacts, Eye Society; Omnicalculator Face Shape Calculator).
Method 2: Determine your face shape from a photo
If a tape measure feels fiddly, a photo works almost as well for a rough read, and it's easier to do consistently.
- Take a straight-on photo in even lighting, hair off your face, neutral expression, phone or camera held at eye level (not tilted up or down).
- Overlay or visually compare the photo against a face shape chart: line up your hairline, cheekbones, and jaw against each shape's outline.
- Look for the same three things as the manual method: which part of the face is widest, whether the face reads long or roughly as-wide-as-long, and whether the jaw is angular or soft.
This method is faster than a tape measure but more subjective. Small differences in camera angle or expression can nudge which shape looks closest. For a repeatable read from one photo, try the detector.
Method 3: Use a face shape detector (fastest)
A face shape detector uses a trained AI model to recognize your face shape directly from a single photo (no measuring required) and returns your result in seconds. It's the fastest option and removes the guesswork of eyeballing a chart. Our detector covers the five most common shapes (oval, round, square, oblong, and heart); if you think you have a diamond or triangle face, use the manual method above. Try the free face shape detector: no sign-up, and your photo is deleted immediately after analysis.
How to read your measurements
Once you have your four numbers, this table maps the pattern to a shape.
| If your measurements show… | Your likely shape |
|---|---|
| Length ≈ 1.5× width; forehead slightly wider than jaw; soft, tapered chin | Oval |
| Length ≈ width; cheekbones widest; soft jaw, no sharp angles | Round |
| Length ≈ width; forehead, cheeks, and jaw about equal; strong angular jaw | Square |
| Length noticeably greater than width; forehead, cheeks, and jaw similar; straight cheek line | Oblong / rectangle |
| Forehead and cheekbones widest; chin narrow and pointed; length > width | Heart |
| Cheekbones clearly widest; forehead AND jaw both narrow; pointed chin | Diamond |
| Jaw wider than forehead (or forehead wider than jaw for inverted); length > width | Triangle / inverted triangle |
If two rows both seem to fit, your face likely blends two shapes: that's common, and either shape's styling guide is a reasonable starting point.
Common mistakes
- Measuring over hair. Hair adds width to the forehead or jaw reading. Always pull hair back or measure on a photo where hair is off the face.
- Tilted camera or head angle. A photo taken from slightly above or below distorts the length-to-width ratio; shoot straight-on, camera at eye level.
- Smiling or exaggerated expressions. Smiling can widen the cheeks and shift the jawline; use a neutral, relaxed expression.
- Glasses on. Frames obscure the true forehead and cheekbone lines. Remove glasses for the photo or measurement.
Sources
Frequently asked questions
Can ChatGPT tell my face shape?
A general-purpose AI chatbot can offer a rough guess if you describe or share a photo, but it isn't purpose-built for this, so results can be inconsistent between attempts. A purpose-built face shape detector uses a proprietary AI model trained specifically on labeled face photos to recognize your face shape.
How do I measure my face shape at home?
Use a flexible tape measure or string-plus-ruler, pull your hair back, and measure four things: forehead width, cheekbone width, jawline width, and face length from hairline to chin. Compare which is widest and whether your length is clearly greater than your width using the table above.
What's the most accurate way to determine face shape?
Averaging two tape-measure readings per line tends to be the most transparent method, since you can see the exact numbers. A purpose-built photo-based detector is faster and gives a consistent read from a good, straight-on, well-lit photo.
Can I tell my face shape without measuring?
Roughly, yes: many people can eyeball whether their face reads long, round, or angular by comparing a straight-on photo to a face shape chart. It's less precise than measuring or using a detector, especially for faces that blend two shapes, but it's a reasonable starting point.