Stach Care How to Grow a Pencil Mustache: The Complete Guide
Thin, precise, and sitting just above the lip like it was drawn on by a steady hand. The pencil is fast to grow and unforgiving to trim. Here is the technique.
The pencil is the only mustache in the encyclopedia where the growing takes two weeks and the trimming takes a lifetime. It is a thin line of hair sitting just above the top lip, narrow enough that it looks like a deliberate stroke. It was the mustache of 1930s Hollywood, of Clark Gable and Errol Flynn, and it has been revived by everyone from John Waters to Prince. It is elegant, slightly wicked, and extremely easy to get wrong.
What It Is and Who It Suits
A pencil is a narrow strip of mustache hair, typically an eighth to a quarter of an inch tall, running the width of the mouth and sitting either directly on the lip line or with a thin shaved gap below it. Some versions are a single line; others (the "Gable") have a tiny parting at the center.
It suits oval, round, heart, and diamond faces. Because it is so minimal, it works on smaller faces and delicate features that a chevron would bury. Round faces benefit from the horizontal line, which adds width without bulk. It looks best with clean-shaven cheeks and a sharp jaw; it tends to get lost on a full beard.
Growth requirements: almost none. A pencil works even with sparse or slow-growing hair, because you are only keeping a thin line. It does, however, require even density across the lip; gaps are very visible at this scale.
Growth Timeline
Weeks 1–2. Let the whole upper lip grow. You need the full hair to see where the strongest, most even line lives. By the end of week two you already have enough length to begin.
Weeks 3–4. Choose your line. Shave the cheeks and chin clean. With a detail trimmer, remove the mustache hair above your chosen line, leaving the thin strip. This is the only "awkward stage" the pencil has: a slightly fuzzy line while the shape settles.
Weeks 5–8. Refine. Shave the upper edge every two or three days; the pencil lives on a sharp top line. Decide whether you want a gap below (shave a thin strip just above the lip) or the hair sitting right on the lip.
Weeks 8+. The pencil is a maintenance style from here. Growth is irrelevant; precision is everything.
Tools You Need
- A precision trimmer with a narrow detail head (non-negotiable)
- A razor for cheeks, chin, and the upper edge
- A magnifying mirror; you are working at a small scale
- Small scissors to keep the strip short
- A light wax or balm to keep the line lying flat
How to Trim and Shape It
- Shave everything except the mustache. A pencil needs a clean frame.
- Comb the mustache down.
- Decide the height of the strip. A quarter inch is classic; an eighth is bolder.
- With the detail trimmer, define the top edge of the strip, working from the center outward, one side at a time.
- Shave the hair above that edge with a razor for a crisp line.
- Optional: shave a very thin gap between the strip and the lip. This makes the pencil "float."
- Trim the strip length with scissors so it lies flat, not bristly.
- Check from a distance. The pencil is judged from across the room, not in the mirror.
Styling Technique
A tiny amount of light wax or balm, combed through, keeps the hairs lying flat and the line sharp. For a Gable-style center part, comb outward from the middle and press with a fingertip. No volume, no curl. The pencil is about edge, not body.
Common Mistakes
- Going too thin too fast. You cannot add hair back. Start at a quarter inch and work down.
- Letting the top edge grow fuzzy. Shave it every two to three days, minimum.
- Uneven height from left to right. Work from the center outward and compare constantly.
- Wearing it with stubble elsewhere. The pencil needs a clean canvas.
- Trimming with a big guard trimmer. You will take off the whole line. Detail head only.
Variations Worth Knowing
The Gable has a thin center parting that splits the strip into two slender halves. The Flynn sits a fraction higher with a visible gap above the lip. The "chevron pencil" keeps a little more height for wearers who want the elegance without the fragility. The Waters is thinner than a shoelace and requires daily devotion. Choose by how much time you want to spend in front of a magnifying mirror each week, and by how much hair you have to spare at the center of your lip.
Famous Wearers
Clark Gable and Errol Flynn made the pencil the mustache of the golden age. Vincent Price gave it a sinister edge. John Waters turned it into a trademark thinner than most eyeliner. Prince proved it could be glamorous and dangerous in the same breath.
How to Maintain It
Shave the top edge every two to three days. Shave the cheeks and chin daily. Trim the strip length weekly. Balm it to keep it flat. The pencil is the lowest-growth, highest-attention style there is; five minutes every other day, and it will look exactly like it did on a 1939 movie poster.
Mr. Stach grooming content is educational and not medical advice.
Grooming content is educational and not medical advice.
Frequently Asked Questions
How long does it take to grow a pencil mustache?
Only about two weeks of growth before you can shape it, because you are keeping only a thin strip. After that it is all about trimming.
How thin should a pencil mustache be?
Between an eighth and a quarter of an inch tall. Start at a quarter inch and go thinner once you are comfortable with the look.
Should there be a gap between the pencil mustache and the lip?
Either works. A thin shaved gap makes the line float and look more deliberate; sitting directly on the lip line is the classic Gable look.
How often do I need to trim a pencil mustache?
Shave the top edge every two to three days and trim the strip length weekly. The pencil depends on a sharp edge.
