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What’s This About
Shaping a beard comes down to two lines and one length. The length is taken down first with a guarded trimmer against the grain; the neckline is set low on the neck and curves up to the corners of the jaw, with everything below shaved; and the cheek line is left where it grows and tidied, or shaved to a clean edge. The mistake to avoid is a neckline taken up towards the chin, which shaves away the beard’s weight underneath.
This guide answers the questions men ask with a trimmer in one hand, such as
• Where exactly should the neckline be, and how do I find it?
• Should the cheek line be natural or shaved sharp?
• How should the beard look under the chin?
• Do I trim up or down, and in what order?
• Which tools do I need, and how do I shape a beard for the first time?
and many more!
The method is nine steps, and the page ends with three mistakes worth avoiding.
Key Points
01The neckline sets the outline, so start it low, at the Adam’s apple, with a slight upward curve to the point under each ear and a clean shave below; move it up only if needed, and keep it under the jawline.
02The cheek line is a choice between natural and tidied, which Beardbrand favours, and shaved sharp, which shows every stray and needs redoing within a few days.
03Length comes before lines. Take the length down with a guard, against the grain, one setting at a time, then set the neckline and cheek line with the comb off.
04The lines every few days, the length about once a week on a longer beard, and a leave-on product chosen for your skin after washing.
The short answer
A beard is shaped by where it stops as much as by how long it is.
Beardbrand’s shaping guide gives its neckline method in one sentence, “stack your middle and index fingers above the Adam’s apple; just above where the top finger sits is where your neckline should be”, and adds that “you may only need to use one finger, while others may use two”.
Philips’ neckline guide starts lower, telling you to “place a finger just at the top of your Adam’s apple”, and describes the shape, “A slight upward curve is best”, staying under the jawline, with “a vertical line below your earlobes” to define the corners.
The cheek line is the second decision, and Beardbrand’s advice is to work with the line you have, because “it’s best to spruce up what you have rather than creating a laser-sharp cheek line”.
The rest is order (length first, then the lines), tools, and the three mistakes.
Key rule. Length first with a guard, then a neckline set low and moved up only if needed, a cheek line kept natural or clean, and nothing cut up onto the jaw.
Where the neckline goes, and how to find it
The neckline is the line below which the neck is shaved, and, in Beardbrand’s words, “your neckline and jawline are not the same thing”.
Published guides put the neckline anywhere from the Adam’s apple itself to about two fingers above it, so start at the lower end and move it up only if needed, because hair cut away cannot be put back.
By name, Braun’s US stubble guide ends the line “somewhere between the top and bottom of your Adam’s apple”, Philips puts it “just at the top”, Beardbrand uses one or two stacked fingers above it, and Braun’s UK neckline guide suggests “two fingers (or 1.5 inches) above your Adam’s apple”.
To find it, tilt your head back slightly and put a finger at the top of your Adam’s apple, as Philips describes, to mark the centre of the line; Beardbrand’s alternative is to tilt the chin down so the skin folds and trim everything below the fold.
Shape it from the centre point, trimming outward on each side with the comb off, staying under the jawline and curving slightly upward to the point under each earlobe; Philips’ method works “outwards from the middle”, and its warning is “Don’t make your beard neckline too round.”
Then check the line from the front with your head level, and raise it a few millimetres only if the neck still looks untidy.
The corners are defined where a short vertical line down from below each earlobe meets the horizontal line, and Philips leaves the choice between “a chiseled, angular corner” and one gently rounded off.
Shave everything below the line with a razor, ideally at the end of a shower and in the direction the hair grows, which is the American Academy of Dermatology’s advice for the neck; in Philips’ phrase, “follow up with a clean neck shave to make your beard neckline something your collar will feel proud to be seen with”.
Keep it there, because a neckline that creeps up towards the jaw with each trim ends up at the chin, and Beardbrand’s warning is that “trimming too high may cause you to lose some of the mass and perceived volume of your beard”; Braun’s fix for a line taken too high is to let the hair grow back “for a few days before trimming again”.
Natural or defined
The cheek line is the upper edge of the beard on each cheek, and there are two ways to handle it.
The natural way is to leave the line where the beard grows and remove only the strays above it, working down until the beard gets denser; Beardbrand’s position is that “most men have a gradual, gentle curve to their natural beard line” and that a natural line takes less work to keep.
For a defined line, shave a clean edge from the sideburn towards the corner of the moustache, straight or slightly curved; it costs upkeep, because with a very sharp line, in Beardbrand’s words, “any bit of stray hair or stubble stands out way too much”, and Beardbrand’s limit for any cheek line is three days between tidies.
As for where it goes, Beardbrand’s way to set the boundary is to smile into a mirror and follow the line of the smile up to the sideburns, and its warning runs the opposite way to the neckline’s, because “a cheek line that’s too low looks out of place”.
Symmetry is the hard part. Shave the first side, then match the second in the mirror from straight ahead, not from the side.
How a beard should look under the chin
Keep it full, with the beard covering the underside of the chin down to the neckline, so the jaw reads as one line from the ear to the chin and the neck starts where the beard stops.
Beardbrand’s mistake to avoid is the bare underside, with the warning “Don’t leave the underside of your chin bare. Unless, that is, you prefer the look of a double chin, even if you don’t have one.”
The length under the chin can match the cheeks for a boxed beard, run a little longer on a beard meant to add length to a round face, or step down towards the neck in a neckline fade, for which Beardbrand sets the trimmer “at least two notches lower than the setting you use for the hair on your cheeks”.
How to trim and shape a beard, step by step
First, wash the beard, let it dry, and comb it out in the direction it grows.
Second, take the length down with a guard, one setting longer than you think, against the grain in slow strokes; Braun’s stubble guide evens the length before it touches the outline, and Beardbrand’s most important rule is “to not take off too much too soon”.
Then go over the beard once more on the same setting with the grain to even the finish; Beardbrand’s note is that upward strokes take more off and downward strokes take less.
Fourth, set the neckline with the comb off, from the centre outward, at the lower end of the range.
Next, set the cheek line, natural (strays only) or defined (a clean edge), and match the second side to the first.
Sixth, trim the moustache off the lip with a lower setting or with scissors, as Beardbrand suggests, so the mouth is clear.
After that, blend the sideburns into the haircut; where the hair and the beard are different lengths, Beardbrand’s advice is to fade the sideburns with smaller guards.
Eighth, comb through and cut any strays with beard scissors, which catch the single hairs a trimmer leaves.
Finally, shower off the clippings, shave below the neckline (and above a defined cheek line) at the end of the shower with the grain, then apply the leave-on product that suits your skin straight away, as the AAD advises.
Scroll horizontally to see all columns →
| Direction | When | Why |
|---|---|---|
| Against the grain | The main length pass | An even length, in Braun’s stubble guide; takes more off, in Beardbrand’s |
| With the grain | The finishing pass | Takes less off, in Beardbrand’s experience |
| Down from the line, or up to it | Setting the neckline with the trimmer | Philips trims downward from the line; Braun’s stubble guide trims up from the bottom of the neck |
| With the grain, by razor | Shaving below the neckline | The AAD’s advice; against the grain can cause ingrown hairs in some people |
| Not past the jaw | Any pass | Cutting up onto the jaw is how a neckline creeps to the chin |
Up or down, then, is not one answer. It is against the grain for the length, with the grain to finish, and with the grain for the razor on the neck.
What you need
A beard trimmer with an adjustable comb that moves in small steps, for the length; Braun’s stubble guide works in 0.5 mm stages, and because comb numbering and lengths vary between makers, read the markings on your own comb.
A razor, cartridge or safety, for the neck and a defined cheek line.
Beard scissors and a fine comb for the moustache and the strays; scissors give control a trimmer does not.
A brush to lift the hair before trimming, a mirror you can get close to, and good light from the front.
A leave-on product chosen for your skin; the AAD suggests beard oil for normal to dry skin, a beard conditioner for acne-prone skin and a fragrance-free, non-comedogenic moisturiser for sensitive skin, because “Well-hydrated skin and hair feel softer, itch less, and look healthier.”
Shaping a beard for the first time
Grow it first. Philips’ point for starting on the neckline is once the beard “goes beyond 3mm and starts turning into a proper beard”, so the outline is cut from a beard rather than guessed at from stubble.
The three-month rule is an informal rule of thumb for full beards, which says to wait about three months before judging how the beard fills in; our guide to how to grow a beard covers that wait.
Set the neckline at the lower end of the range before anything else changes, and leave the cheek line natural for the first few weeks.
Take the length down in stages, a millimetre at a time, and stop when it reads as tidy rather than short; as Beardbrand puts it, “you can’t put back what you’ve already cut off”.
If the lines worry you, have a barber set them once and keep them up at home afterwards.
Our stubble guide covers the lengths below a beard, our guide to short beard styles covers the outlines, and the beard styles guide and face shapes guide cover which beard suits which face.
The three mistakes
The first is the neckline at the jaw, which removes the beard’s weight, shows the underside of the chin and gives, in Beardbrand’s phrase, “the look of a double chin”; set it low and leave it there.
A cheek line too low or too sharp is the second, because a shaved line below the natural growth “looks out of place”, in Beardbrand’s words, and a razor-sharp line on a beard that is not kept up shows every stray.
The third is trimming fast, or trimming without a guard. Both take more than intended, and Beardbrand’s advice is to “Go slow” and give yourself plenty of time.
Common questions
How should a beard look under the chin?
Covered down to the neckline, at the cheeks’ length, a little longer, or faded a setting or two shorter towards the neck; a bare underside, in Beardbrand’s view, gives the look of a double chin.
Is it better to trim a beard up or down?
Against the grain for the length pass (usually upward, since Beardbrand notes beard hair grows downward in most cases), with the grain to finish, and with the grain for the razor on the neck, as the AAD advises.
How do I shape a beard for the first time?
Let it grow past stubble, take the length down a millimetre at a time, set the neckline at the lower end of the published range, and leave the cheek line natural; or have a barber set the lines once and keep them up at home.
How do I shape a beard cheek line?
Either tidy the natural line by removing strays above it, or shave a clean edge from the sideburn towards the corner of the moustache, no lower than you need; match the second side from straight ahead in the mirror.
How often should I shape my beard?
Beardbrand’s limit for the cheek line is three days, and the neckline needs a look as often; Beardbrand’s guide for a longer beard is a trim about once a week, depending on how fast the hair grows.
Sources checked for this article (12 September 2026, re-checked 12 October 2026)
Beardbrand, How to shape your beard into magnificence, 22 May 2019, https://www.beardbrand.com/blogs/urbanbeardsman/shape-beard
Philips (US), How to trim and shape a beard neckline (Give your beard a border), 20 February 2026, https://www.usa.philips.com/c-e/womens-beauty-blog/hair-removal/article-how-to-trim-a-perfect-beard-neckline
Braun (UK), How to trim and shape the perfect beard neckline, https://uk.braun.com/en-gb/male-grooming/facial-hair-styles/how-to-trim-and-shape-beard-neckline
Braun (US), How to style your stubble beard, https://us.braun.com/en-us/male-grooming-tips/facial-hair-styles/how-to-get-a-casual-stubble
American Academy of Dermatology, A dermatologist’s top tips for a healthy beard, last updated 14 December 2021, https://www.aad.org/public/everyday-care/skin-care-secrets/face/healthy-beard
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