Whether you want to grow out a luxuriously thick handlebar mustache or a thin chevron, a small mustache gap might stand in the way. Now there are plenty of reasons why you might see a strange gap in your mustache.
The appearance of a gap can depend on your natural growth pattern, hair length and how the mustache is styled. Some gaps become less noticeable with more length or a different shape; others remain part of the look. This guide covers ways to work with the hair you have and choose a mustache that suits it.
Types of Mustache Gap
A mustache gap, also known as a mustache window, is an area where facial hair does not grow, resulting in a gap or empty space in the mustache. Some of the most common types of mustache gaps include:
Mustache Gap in the Middle
A center gap can actually work in your favor when it’s small, acting as a natural partition that gives a handlebar mustache its signature split personality. Where it gets tricky is when that gap stretches well beyond the philtrum, leaving you with two disconnected halves that no amount of wax can convincingly bridge.
For a small gap, use a fine-tooth comb and a little mustache wax to arrange longer hairs toward the center. This changes how the hair lies, not where it grows. You can also leave the center part visible and sweep the sides outward into a handlebar.
Mustache Side Gap
A side gap is a different beast entirely. Rather than splitting the mustache down the middle, it creates a break along one side, either preventing the mustache from connecting to the beard or leaving a bare patch at the outer corner of your upper lip.
If your connector growth is weak on one side, lean into a disconnected goatee aesthetic and let the medium stubble on your cheeks frame the look so the gap comes across as a deliberate style choice rather than a growth problem.
Bald Spot
Bald spots are the most unpredictable of the three because they follow no set pattern and can sit anywhere on the mustache as a small, bare patch. If the spot has always been part of your growth, your best move is to shape around it. If a smooth, round patch appears suddenly, have a dermatologist check it before you style around it, because alopecia areata often begins this way.
Sculpt your mustache outline lower, below the bald zone, so the sparse area sits outside your perimeter entirely. Finish with a detail trimmer to keep the edges razor-clean and the overall shape looking purposeful.
What Causes a Mustache Gap?
Now that you better understand mustache gaps, we can get into what really causes them. The human body is a complex machine, so plenty of factors can affect how your mustache turns out or whether it will have gaps. Some of the most common causes include:
Genetics
Genetics is one of the main factors in how thick or sparse your mustache grows. If a gap has been there since your mustache first filled in, it may simply be part of the growth pattern you inherited.
That said, unfavorable genetics don’t mean you’re stuck. With the right mustache style, smart grooming, and a little patience, you can absolutely work with what you’ve got.
The Direction of Hair Growth
Your mustache has a natural growth direction. Brushing can arrange the existing hairs toward or away from a gap, changing how visible it looks.
Pay attention to which direction your growth lies, and redirect it deliberately with a boar-bristle brush and a light beard balm every morning.
Size of the Mustache
A thick, dense mustache with strong color will absorb a gap visually, making it nearly invisible to anyone who isn’t looking for it. Flip that around to a fine, light mustache and even the smallest gap above the upper lip becomes front and center.
Growing more bulk and length is often the simplest solution before you explore any other fix.
Poor Shaving Technique (Patchiness)
Shaving without proper prep, skipping shave gel, or dragging a dull razor across your upper lip can cause patchiness that mimics a natural gap. Aggressive, repeated shaving over the same spot can irritate the skin and trigger razor bumps or ingrown hairs that break up the area, so trim instead of scraping.
Use a sharp razor you can control comfortably with a transparent shave gel, so you can see the line, and always shave with the grain along your upper lip line.
A Larger than Average Philtrum
Some guys are simply born with a wider philtrum, that vertical groove running from the base of the nose down to the cupid’s bow of the upper lip. Hair growth around the philtrum varies from man to man, and extra length will not always cover a center gap.
Owning the look with a style that works around the philtrum, like a well-waxed handlebar or a bold chevron mustache, is far more effective than fighting your own anatomy.
How to Fix a Mustache Gap
There are several ways to make a gap less noticeable, including growing more length, changing the outline or using wax. These are styling options rather than guaranteed ways to grow hair in a bare area. Start with the approach that works with your current coverage.
Growing a Long Mustache to Cover the Gap
Letting your mustache grow out is the most straightforward fix, even if the in-between phase looks rough. Resist the urge to trim it back, be patient, and give the hair enough length to drape over the bare zone.
Brush it daily with a fine-tooth beard comb and apply a light beard oil to keep the hairs soft, conditioned, and easier to arrange.
Using Mustache Growth Products
If length isn’t coming in fast enough, conditioning balms and beard oils can still help the hair you have look fuller. These products soften and condition the hairs and keep the skin beneath your mustache comfortable, though no topical oil is proven to speed up growth or add density.
With enough length, covering that gap becomes significantly easier to pull off.
Mustache Wax for Filling the Gap
Once your mustache has enough length to work with, a firm mustache wax becomes your best styling tool. Work a small amount between your fingertips, press it into the mustache, and comb the hairs over the gap to lock them in place.
It keeps everything neat, holds the shape all day, and gives your mustache a polished, well-groomed finish.
Mustache Fibers for Filling the Hole
When length alone isn’t enough to close the gap, mustache fibers are a solid backup plan. Made from tiny keratin or plant-based fibers, they cling to existing strands and fill in bare patches convincingly, recreating the appearance of a full, dense mustache.
They work best when your existing hair gives them something to bond to, so a little growth goes a long way before applying them.
Trimming and Shaping for a Neater Appearance
If your gap sits at the top of your mustache, drop your trim line below it. Reducing the overall height of your mustache so the bare zone falls outside the outline entirely is a clean, no-fuss fix.
Use a detail trimmer to carve a precise, even baseline, and the result is a lower-set mustache that looks completely balanced and well-sculpted.
Mustache Styles with Gap
After reviewing how you can likely solve your mustache gap problem, let’s talk about styling that stash. Some styles let you embrace the gap with serious personality, while others cleverly camouflage it by shaping the mustache a certain way.
1. Curled Handlebar Mustache with a Center Gap
A center gap is no reason to abandon a handlebar mustache. Grow it out long enough to build real density across the upper lip, then brush it outward daily to train the hairs away from the gap zone.
Once those curled tips are locked in with a firm mustache wax, the eye follows the dramatic upswept ends rather than any sparse patch in the middle.
2. Long Curled Mustache with a Chin Beard
Long, finely curled tips give this mustache its shape, while a short chin beard adds weight below. The mustache parts through the center and sweeps outward instead of being combed across the gap. Leaving that part visible makes it part of the design rather than something you need to hide.
Work a small amount of wax through the ends, then curl each tip upward and outward. Keep the chin beard separate from the mustache’s fine ends so their outline stays clear. This is a curled handlebar variation rather than the sharply upright points of a Dali.
3. Salt-and-Pepper Horseshoe Mustache
A cowboy mustache can take a horseshoe shape, with the sides continuing down past the mouth corners. Here, the center stays lighter while the long arms define the outline. Leave the chin clear and keep the two downward sections balanced instead of trying to comb them across the upper lip.
Use a detail trimmer to tidy the inner and outer edges of the arms, preserving their length beside the mouth. The gray and darker hairs add variation through the mustache.
4. Handlebar Mustache with a Short Full Beard
A thick handlebar can stand out above a short full beard, even with a visible part at the center. The curled ends draw the eye outward, while the beard frames the chin and jaw below. Keep the mustache longer than the surrounding beard so those two shapes stay distinct.
Comb the beard downward before trimming its outline, then shape the mustache tips separately with a little wax. Preserve the center part rather than forcing hair across it. The combination works through contrast between the curled upper section and the compact beard below.
5. Chevron Mustache with a Thin Appearance
If your gap sits near the top of the upper lip, a chevron mustache trimmed just slightly shorter than full density keeps the sparse zone from becoming the focal point. For a gap closer to the lip line, resist the urge to trim and let the mustache grow downward to cover it naturally.
Use a boar-bristle brush to press the hairs flat and keep the chevron shape clean without a razor line that might expose the gap.
So, How Do You Fix the Mustache Gap?
More length may help cover a small gap, while trimming or parting the mustache can make a larger one look intentional. Wax helps arrange the hair you already have, and beard oil can make it easier to comb. Choose a shape that works with your growth rather than expecting every gap to close.
