Eyebrow Mapping Tool
The three lines every brow artist draws before shaping - start, arch, tail - found on your own face by a 478-point mesh and measured in millimetres against where your brows actually sit. Upload a photo or map them live on camera. Free, processed in your browser.
For a clean map: face the camera squarely, brows relaxed, hair off the forehead, even light.
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The three lines follow your face in real time; freeze any frame to measure it.
ExampleWhat Is Eyebrow Mapping?
Brow mapping is the placement step before any shaping: waxing, threading, tinting, lamination or microblading. The artist holds a pencil (or a length of thread) against the outer edge of your nostril and pivots it to three angles. Where the line through the inner corner of your eye crosses the brow is the head; where the line through your pupil crosses it is the arch; where the line past the outer corner of your eye crosses it is the tail. Everything between those three points is design; the points themselves are anatomy.
The catch is that the pencil method is done by eye, in a mirror, one side at a time. This tool draws the same three lines from the same pivot on your face and prints, for each brow, how far the actual head, peak and tail sit from them - in millimetres, using your own iris (11.7 mm across in almost every adult) as the ruler. It also reads the height of the tail against the head, the gap between the two brows, and whether the two heads sit level.
How to Map Your Eyebrows: The Three Pencil Lines
1 · Line 1 · the start
Rest a pencil on the outer edge of your nostril and angle it up through the inner corner of your eye. Where it crosses the brow is where the brow should begin.
Starting further in narrows the gap between the brows and pulls the eyes together; starting further out widens the face and leaves the bridge of the nose unframed.
2 · Line 2 · the arch
Angle the pencil from the nostril edge through the centre of your pupil while you look straight ahead. The highest point of the brow sits on that line.
That lands the peak about two-thirds of the way along the brow (58 to 72%), where a lift reads as open rather than surprised. Peaks placed further in look severe; further out, they drag the eye down.
3 · Line 3 · the tail
Angle the pencil from the nostril edge past the outer corner of your eye. The brow should extend to that line and taper there.
A tail that stops short leaves the outer eye unframed and makes the face read wider. The tail should end level with the head or a touch above it, never below.
The tool measures all three lines in your face's own axes (the fitted midline), so a tilted head does not tilt the map. A turned head does foreshorten one side, which is why it asks for a square photo.
Eyebrow Shape by Face Shape
The three lines are the same on every face. What changes with face shape is the brow you draw between them: how high the arch rises, how sharp its corner is, how long the tail runs. The same photo classifies your face shape, and the result pairs it with the note below.
| Face shape | Brow that balances it | Why |
|---|---|---|
| oval | Soft arch | An oval face is already balanced, so the brow follows its own natural line: a gentle lift at the two-thirds mark and a tapered tail. Most shapes work; extremes are the only thing to avoid. |
| round | High or angled arch | The arch adds a vertical line and a lift to a face made of curves, which is what makes a round face read longer. Keep the tail slightly longer than the head. |
| square | Soft, rounded arch | A rounded peak softens a strong jaw and a wide forehead. A hard angle repeats the corners of the face; a flat brow adds width. |
| heart | Rounded or soft arch | A rounded shape and a slightly shorter tail take weight off the wide upper face and stop the forehead reading larger than the chin. |
| oblong | Flat or straight | A straight brow adds horizontal width and no lift, which shortens a long face. A high arch would stretch it further. |
| diamond | Curved, soft arch | A curved brow with a soft peak balances wide cheekbones against a narrow forehead and chin. Keep the tail long enough to frame the outer eye. |
There is no single correct brow. The map tells you where your brow is; the shape you want is a decision, and a good artist will start from your natural line rather than the chart. The round-face brow guide walks through one shape in depth.
Getting an Honest Map
Face the camera squarely
The map is measured in your face's own axes, so a tilted head is fine, but a turned head foreshortens one brow and one nostril. Under 10° of turn keeps both sides honest.
Relax the brows
Raised brows move the ridge landmarks up and lift every arch reading. Neutral face, eyes open, looking into the lens.
Bare brows, hair back
Brow pencil and a heavy fringe both move where the brow appears to start and end. Map the brow you actually have, then plan the one you want.
Read it as a placement, not a verdict
Every millimetre carries about ±1 mm through the iris ruler, and the shaded bands are a brow artist's working tolerance (start ±2.5, arch ±2.5). Sitting outside a band is information, not a fault.
Frequently Asked Questions
What is eyebrow mapping?
Eyebrow mapping is the technique brow artists use before shaping, tinting or microblading: three lines drawn from the outer edge of the nostril mark where the brow should start (through the inner corner of the eye), where it should arch (through the pupil) and where it should end (past the outer corner of the eye). This tool finds those three lines on your own face from a photo or your live camera and measures, in millimetres, how far your actual brow sits from each one.
How do you map eyebrows with a pencil at home?
Stand square to a mirror with a relaxed face. Rest a pencil on the outer edge of one nostril and angle it through the inner corner of that eye: where it crosses the brow is the start. Pivot the pencil on the nostril so it passes through the centre of your pupil while you look straight ahead: the arch peaks where it meets the brow. Pivot again so it passes the outer corner of the eye: the tail ends there. Repeat on the other side and check both tails sit level with, or slightly above, the heads.
Where should my eyebrows start and end?
The head of each brow should begin on a line from the outer edge of the nostril through the inner corner of the eye, and the tail should reach a line from the same nostril past the outer corner of the eye. The tool draws both lines on your photo and prints the offset for each brow, so you can see whether a brow starts too far in, stops short, or already sits on the map.
Where should the arch of my eyebrow be?
On a line from the outer nostril through the centre of the pupil, which puts the peak roughly two-thirds of the way from head to tail. The tool reports the arch position as a percentage (58 to 72% is the classic placement) and classifies the arch as straight, soft or high from how far it rises above the head-to-tail line.
Is the golden ratio eyebrow map accurate?
The three-line method is a placement convention, not a law, and different artists pivot the arch line on the pupil centre or the outer edge of the iris, which moves the peak by a millimetre or two. (The start line is sometimes drawn as a plumb line from the nostril wing; that lands 4 to 6 mm outside where almost every brow actually begins, so this tool draws it through the inner corner of the eye, the way it is drawn in practice.) This tool uses the pupil-centre version and states its own tolerance: about ±1 mm on every offset through the iris ruler (11.7 mm across in almost every adult), plus the mapping bands a brow artist works to. Treat it as an accurate estimate of where your brows sit, not a target you must hit.
Why are my eyebrows uneven?
Almost everyone's are. The two sides of the face are built separately, so one brow usually sits a little higher, arches earlier or runs longer than the other; a difference of a millimetre or so between the heads is normal and rarely visible. The tool measures the height difference between the two heads and shows both tails against both maps, which is the information you need before deciding whether to correct anything.
Which eyebrow shape suits my face shape?
The same photo classifies your face shape, and the result pairs it with the brow that balances it: a higher arch adds length to a round face, a straighter brow shortens an oblong one, a softer rounded arch calms a square jaw. The mapping lines stay the same for every face; the shape of the brow you draw between them is what changes.
Does this eyebrow mapping app upload my photo?
No. The face mesh runs in your browser, on your device, for both the photo and the live camera modes, and the map is drawn there. Only the resulting measurements (not the photo or the mesh) are saved so the free tools can be improved; you can also use the live mode without ever taking a picture.
Related Tools and Guides
Eyebrow Shape for a Round Face
The one shape, in depth: arch height, tail length and the mistakes that widen a round face
Face Shape Detector
Oval, round, square, heart, diamond or oblong from the same 478 landmarks
Eye Shape Detector
Almond, round, hooded, upturned, downturned or long - the eye the brow frames
Face Symmetry Test
Twelve landmark pairs across your midline, including both brows