Fullness
Lip height set against lip width. This is the trait that names your shape, mostly because it's the one people register first from across a room.
Free AI Tool — 5 Traits Measured
Lip Shape Analyzer
A lip shape analyzer is an AI tool that maps landmark points around your mouth and measures five separate traits — fullness, cupid's bow depth, width, vertical balance, and symmetry — then names your shape from whichever trait defines it most clearly.
Ask two friends to describe their lips and you'll likely get the same word from both — "thin," probably, since it's the label most people reach for first. Upload a front-facing photo here and the two of you can end up with almost nothing else in common: one with a sharp, defined cupid's bow and a narrow mouth, the other with a flat bow and a wide one. Same headline word, different mouth entirely. Two free scans run daily with no account required, nothing you upload sits on a server afterward, and the outline drawn back onto your photo comes straight from the points the model measured.
5 traits
measured
measured
Never stored,
always private
always private
2 free scans
daily, no sign-up
daily, no sign-up
1 Upload Your Photo
Measuring your lips…
AI analysis in progress
2 Your Lip Shape
Your lip shape and a breakdown of all five traits will appear here, with your lip outline drawn from the measured points.
Share your result
The Five Traits We Measure
"Lip shape" gets treated as one label everywhere else — full, thin, heart-shaped — and that's exactly the problem. A single word can't hold five independent measurements at once, so this tool doesn't try to squeeze them into one.
Cupid's Bow
How deep the dip runs between the two peaks of your upper lip — read at rest, not mid-expression.
Width & Balance
Mouth width checked against face width, plus upper lip height checked against lower. Two different questions, reported side by side.
Lip Symmetry
Your mouth's corners and bow peaks, mirrored against the center line of your own mouth — not compared to anyone else's.
Fullness gets top billing because it's the most visible trait and the one most people already have an opinion about. The other four are what separate your mouth from someone else's who got sorted into the same headline category.
One thing worth flagging before you read your results: the figure next to each trait describes how strongly that trait reads, not how much of it you physically have and not a percentage of the trait itself. A 93 next to "Thin" means the reading is distinctly, unambiguously thin — not that your lips are 93% full. A 60 next to "Medium" means the opposite: you're sitting close to a boundary, and a different photo could tip you into the neighboring label.
Reading Your Numbers
Each figure tells you how clearly a trait applies to your face — not how much of it you have, and never whether it's a good or bad thing to have.
85 and Above
Clearly This Trait
The reading is distinct enough that most people looking at your face would land on the same word without hesitating.
70 – 84
Moderately This Trait
The label fits, technically, but it's not a strong or obvious example of it.
Below 70
Borderline
You're near the edge between two categories. A different angle or a different day could shift which side you land on.
Getting an Accurate
Lip Reading
Your mouth moves more than any other feature on your face, which makes it the single most photo-sensitive measurement on this site.
Relaxed, Closed Mouth
A smile stretches your lips thinner and wider than they sit at rest — by far the biggest source of a skewed reading.
Square to the Camera
Turn your head even slightly and one half of your mouth foreshortens in the frame, which throws off the symmetry figure specifically.
Skip the Lip Liner
Overlining moves the edge the model detects. It isn't reading your actual lip line anymore — it's reading wherever the liner put it.
Even, Flat Lighting
A shadow sitting under your lower lip is the most common reason the traced outline lands in the wrong place.
How the Lip Analyzer Works
1
Upload Photo
One clear, front-facing photo, mouth relaxed, is all it takes.
2
Lip Outline Found
20 of the 68 facial landmark points trace your outer and inner lip edges specifically.
3
Five Traits Measured
Height, width, bow depth, vertical balance, and symmetry are each scored on their own.
4
Shape Named
Fullness sets your headline label; the other four traits fill in everything that label leaves out.
Why Choose
FaceShapesAI?
Advanced AI technology combined with beauty science to give you the most accurate results.
Advanced AI Technology
Trained on millions of faces for high accuracy.
Privacy Focused
Your photos are never stored. 100% secure & private.
Instant Results
Get your analysis in seconds, not minutes.
Personalized Tips
Receive style, haircut & grooming recommendations.
User Friendly
Simple, easy-to-use interface for everyone.
Works for Everyone
Our AI works for all genders, ages, and ethnicities.
Why One Label Isn't Enough
Search "lip shapes" and you'll get lists of eight or ten named types — heart-shaped, bow-shaped, downturned, wide. Useful shorthand, sure. But every one of those names is a combination of measurements bundled together, not a measurement in its own right. "Heart-shaped" is really just a pronounced cupid's bow paired with a fuller lower lip. "Bow-shaped" is a defined bow paired with balanced height. Neither name tells you which of those two ingredients is doing the work on your specific mouth.
That distinction matters more than it sounds like it should. If you're trying to figure out which lipstick application suits you, the honest answer depends on your bow definition and your vertical balance — not on which of ten named boxes your mouth got filed into. Reporting the components separately, the way our nose shape detector does for nose geometry, gives you something you can act on.
What Each Trait Actually Tells You
Fullness is total lip height measured against mouth width. It's the trait that names your shape because it's the most visible from a distance — and it's also the trait expression moves the most. A single smile can shift you a full category.
Cupid's Bow is the depth of the dip between your upper lip's two peaks. A defined bow gives a resting mouth its shape without any product; a flatter one reads as softer, which is exactly why lip liner tends to change more for some people than for others.
Width compares your mouth to your own face width rather than measuring in absolute terms, so the figure stays meaningful no matter how large or small your features are. A narrow mouth on a wide face reads completely differently from that same narrow mouth on a narrow face.
Vertical Balance is upper lip height set against lower. Most people land somewhat bottom-heavy here — a perfectly balanced or top-heavy result is the less common outcome, not some hidden ideal to aim for.
Symmetry mirrors your corners and bow peaks across your mouth's own center line. Almost no one scores near perfect. A slightly uneven mouth is one of the most ordinary asymmetries a face can have, not a flaw worth worrying about.
A Note on What This Isn't
None of these five figures rate your lips. There's no shape that scores better than another, and the trait most people spend money trying to change — fullness — turns out to have the weakest connection to anything else measurable about how a face reads overall.
What the breakdown is useful for is practical: understanding why a certain lipstick shape works on your mouth and not your friend's, why overlining looks seamless on some lips and obvious on others, and why your own mouth seems to photograph differently depending on the angle. Pair it with a nose shape detector or eye shape detector scan and you get a fuller picture of which features are driving your overall look, straight from the same 68-point map.
About This Tool
Nothing on this page routes through a licensed third-party API. Ahsan Fayyaz trained the measurement engine in-house on real faces and benchmarked it against other face-analysis tools, and it's the same engine running every landmark-based tool on the site, including the full tool directory. It's built for entertainment and general self-understanding, not as medical, clinical, or professional advice of any kind.
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Got Questions?
Frequently Asked Questions
It places landmark points around your mouth, measures five traits from them — fullness, cupid's bow depth, width, vertical balance, and symmetry — and names your shape from the trait that defines it most clearly.
20, specifically tracing your outer and inner lip edges — a subset of the same 68-point facial map used across the rest of the site.
They measure how clearly that trait applies to you, not how much of it you have and not a percentage. A 93 next to "Thin" means distinctly thin. It doesn't mean your lips are 93% full — there's no such scale.
No. There's no good or bad direction on any of these five traits. A 95 on symmetry isn't superior to a 60 — they're just different mouths measured the same way.
Yes. Two free scans a day, no account required.
No. It's processed by our own in-house model and deleted from the server the moment your result is ready. What stays visible afterward lives only in your browser's cache — refresh the page and it's gone for good, on both ends.
Expression, mostly. A smile stretches your lips thinner and wider than they sit at rest, and that single shift can move your fullness reading a whole category even though nothing about your mouth changed.
Lip liner specifically, yes — overlining shifts where the model thinks your lip edge sits, which skews every trait downstream of it. Foundation or eye makeup elsewhere on your face doesn't affect the mouth reading.
Almost nobody's is. A mouth that's mirror-perfect corner to corner and peak to peak is rare; slight asymmetry is one of the most common traits a face can have, not a defect worth chasing a "fix" for.
Regularly. Fullness sets the headline word, but two "thin" results can differ sharply on bow definition and width — one narrow-mouthed with a sharp bow, the other wide with a flatter one. Same label, different mouth.
Upper lip height against lower lip height. Most people read somewhat bottom-heavy here — a balanced or top-heavy result is less common, not more desirable.
Yes, especially around the mouth. Any filter that reshapes lip volume or width changes the exact geometry the model reads, so an edited photo and an unedited one of the same person can return noticeably different traits.
Not reliably. Turning your head even slightly foreshortens one side of your mouth in the frame, which throws off the symmetry and width readings specifically. Face the camera directly for a clean result.
Yes — your breakdown, including the traced lip outline, can be shared as a styled image straight from the results screen, no screenshot needed.
It reports the traits — bow definition, fullness, balance — that a lipstick decision actually depends on, rather than handing you a single generic recommendation. What you do with that breakdown is up to you.
Two, tracked by browser and IP address. A free account raises that daily limit, and paid plans remove the cap entirely.
Same in-house model, same 68-point landmark system — this page just isolates the 20 points around your mouth and reports on those specifically, the way our nose shape detector and eye shape detector each isolate their own feature.
No. It's an entertainment and informational tool for understanding your own facial geometry, not medical, clinical, or professional guidance of any kind.
No. Two free daily scans work without signing up for anything.
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