What Trimmer Length Settings Do You Actually Need?
Short answer: Trimmer length settings control how much hair the comb leaves behind. Lower numbers cut closer to the skin; higher numbers leave more length. For a clean, nearly shaved look you use the shortest settings, but the NHS advises keeping at least 1mm of stubble if you are prone to ingrown hairs. Most men only need a short setting for edges, a mid setting for light stubble, and a longer setting for beard maintenance. Choose a trimmer with an adjustable range that matches your regular style.
What do trimmer length settings actually do?
A trimmer length setting is a measure of how much hair stays on your face after you pass the trimmer over it. The comb sits between the blade and your skin, and the setting moves that comb closer to or farther from the blade. Lower settings cut hair shorter; higher settings leave the hair longer. On most trimmers the numbers are printed in millimeters, so the difference between a low number and a high number is the difference between a near-shaved face and a visible stubble.
Many electric shavers include a pop-up trimmer or an attachable comb, so you can switch between a close shave and a styled length without changing tools. If that is what you want, browse electric shavers with a trimmer and trimmer-included electric shavers.
Short settings: light stubble and close grooming
The shortest settings are for people who want the look of a near-shaved face without taking a blade to the skin. They are also the settings to use for sideburns, mustache edges and necklines, where you want a defined line rather than a full shave. See our guide on trimming sideburns if that is part of your routine.
If you get ingrown hairs or razor bumps, do not reach for the absolute closest setting. The NHS page on ingrown hairs says you should not shave too close and that leaving at least 1mm of stubble can help reduce ingrown hairs. The same page recommends trying an electric razor rather than wet shaving, and the American Academy of Dermatology adds that you should shave in the direction the hair grows. Those two habits go a long way toward keeping a light-stubble look comfortable.
For those who are clean-shaven, the shortest setting is still useful for defining the edges of your beard or sideburns, but you will rely on the shaver head for the rest of your face.
Longer settings: beard and mustache maintenance
Longer settings exist for people who keep facial hair. A mid-length comb evens out a short beard across the cheeks and jaw, while the longest combs keep a fuller beard at a consistent length. You can also use a longer setting to fade the neckline into the beard instead of cutting a hard line.
If you grow a beard, the trimmer comb is often the only attachment you need. The body of the beard stays at the longer setting while the shortest settings handle the mustache and the edges of the cheek line. Our beard comb attachment page explains how these combs work, and the short beard article covers the grooming habits that keep a short beard looking intentional.
Which settings matter for your style
There is no single correct setting for everyone. The setting that matters is the one that produces the length you wear most days. If you are clean-shaven, you need the shortest setting only for edges, because the shaver foils do the close work. If you keep stubble, a setting a few millimeters long is your daily choice. If you have a beard, the longer settings carry the look and the shortest one defines it.
| Your style | Which setting to use | Why it works |
|---|---|---|
| Clean-shaven | Shortest comb for edges; foils for the face | A trimmer cannot cut flush to the skin, so you still need the shaver head |
| Light stubble | A short comb setting | Keeps a visible stubble without shaving too close, which the NHS says helps prevent ingrown hairs |
| Short beard | Mid-length comb | Evens out the beard without removing it |
| Full beard | Longest combs for the body; shortest for edges | Keeps the beard at a consistent length and defines the lines |
Fixed combs vs adjustable settings
Some trimmers come with a set of snap-on combs, each with a single length printed on it. Others have a dial or sliding lever that moves the comb continuously across a range of lengths. Snap-on combs are simple and reliable, but you have to stop, pull the comb off, and click a new one in to change the cut. An adjustable setting lets you fine-tune the length without removing anything, which is convenient when you are shaping a beard and want to check the result as you go.
For most people the choice comes down to how often you change length. If you trim at the same setting every time, a fixed comb is fine. If you like to switch between a tight stubble and a longer beard, an adjustable is more pleasant to use.
Another consideration is the range of settings. Some trimmers offer a narrow range, like 1mm to 5mm, while others go up to 20mm or more. If you only ever trim a short stubble, a narrow range is fine. If you occasionally let your beard grow out, look for a trimmer with a longer maximum length so you don't have to switch to a separate beard trimmer.
What to look for in a trimmer
A good trimmer should have an adjustable comb with a range you actually use, a blade wide enough to cover the cheek in a few passes, and parts you can rinse or brush clean. If you trim only occasionally, a pop-up trimmer built into a shaver is enough, and our pop-up trimmer article explains the difference between that and a detachable comb.
If you maintain a beard every few days, look for a trimmer whose settings click into place and stay locked while you work. Cleaning matters too: trimmer combs collect hair and oil, and a quick rinse keeps the blade moving freely.
Before buying, you can also check recall listings at the U.S. Consumer Product Safety Commission to see if a model has been flagged for safety issues.
What to pick for your use
| If you | Pick | Buying guide |
|---|---|---|
| You mostly shave close and only need to clean up edges | A shaver with a pop-up trimmer | Best Electric Shavers with a Trimmer 2026: 15 Picks |
| You keep light stubble or a short beard | A trimmer with a mid-length adjustable comb | Best Trimmer-Included Electric Shavers in 2026: 14 Picks Compared |
| You maintain a fuller beard | A trimmer with a wide range of longer settings | Best Electric Shavers with a Trimmer 2026: 15 Picks |
| You are prone to ingrown hairs | A trimmer that leaves at least 1mm of stubble | Best Trimmer-Included Electric Shavers in 2026: 14 Picks Compared |
Questions
What does a low trimmer setting mean?
A low setting keeps the comb close to the blade, so it cuts hair very short, leaving only a tiny bit of stubble. It is useful for defining edges and for a close, almost clean-shaven look.
What does a high trimmer setting mean?
A high setting moves the comb farther from the blade, leaving more hair length. It is used for maintaining a beard or a longer stubble style.
Should I use the shortest trimmer setting if I get razor bumps?
No. The NHS says that shaving too close can increase ingrown hairs. Leaving at least 1mm of stubble can help reduce them, so choose a longer setting if you are prone to irritation.
Can a trimmer replace a shaver for a close shave?
A trimmer cannot cut hair flush with the skin because the comb always leaves a small amount of length. For a truly smooth face you still need the foil or rotary shaver head. Use the trimmer only for edging and for maintaining stubble.
Update history
- : First published.