A lash map is the plan for a set, drawn on the under-eye tape. It splits the lash line into zones from the inner corner to the outer corner and gives each zone a length, with the curl and diameter noted for the set. To build one, mark the pupil, pick a style, choose the longest length the natural lashes can carry, then step down 1 to 2 mm per zone from there.
Updated: October 2026
1. How to Read a Lash Map
Every lash map chart carries the same information, whatever the layout.
| On the map | What it means |
|---|---|
| Zone numbers | Sections of the lash line. Zone 1 is the inner corner. Five to seven zones is normal. |
| Length in each zone | The extension length in mm for that section, like 8, 10, 12. |
| Pupil center line | The highest point of the pupil. It's the reference for the middle zone. |
| Curl | J, B, C, CC, D, L, LC or M. Usually one curl for the set, sometimes two. |
| Diameter | Thickness in mm. 0.10 to 0.20 for classic, 0.03 to 0.10 for volume fans. |
| Left or right eye | The right eye is the left map mirrored, adjusted for any difference in the natural lashes. |
Our Lash Extension Size Chart explains how those same numbers appear on a tray label.
2. The Five Basic Styles
Learn these five and you can map almost any request. The only real difference between them is where the longest lengths sit.
| Style | Shape of the map | Suggested curl |
|---|---|---|
| Natural | Shortest at the inner corner, gradually longer, soft finish at the outer corner | C |
| Doll eye | Longest over the center of the eye, to open it and round it | D |
| Cat eye | Lengths build toward the outer corner to lift and elongate | CC |
| Open eye | A wider plateau of longer lengths across the middle, tapering at both corners | CC |
| Squirrel | Peak between the center and the outer corner, then shorter at the very edge | CC |
Start with Natural. It follows the client's own growth pattern, so it's forgiving while you learn to judge lengths. We have full guides for the cat eye lash map and the doll eye lash map.
3. Build Your First Lash Map
| Step | What to do |
|---|---|
| 1. Look at the natural lashes | Note length, density and direction across each eye, sitting up. Write down the longest natural lash you see. |
| 2. Agree on a style | Show the client the five shapes and pick one together. Get it on the card before they lie down. |
| 3. Tape and mark | Tape the lower lashes, then mark the inner corner, pupil center and outer corner. |
| 4. Draw the zones | Split the lash line into zones between your marks. Seven is easy to read mid-set. |
| 5. Set the peak | Write the longest length in the peak zone for your style. Pick what the natural lashes can carry, not what looks best on the tray. |
| 6. Fill in the rest | Step down 1 to 2 mm per zone from the peak. No jumps bigger than 2 mm. |
| 7. Check with eyes open | Place a few guide lashes at each mark on both eyes, sit the client up and look from the front and both sides. |
Our free Lash Map Generator does steps 4 to 6 for you. Pick the style, eye shape and peak, and it fills all seven zones and suggests a curl. It also prints a blank lash map template for practice.
4. Adjust for Eye Shape
Style is what the client wants. Eye shape tells you how to get there. Hooded lids hide the lash base, so use lifted curls like L, LC or M or the length disappears under the fold. Monolids are similar, and L, LC or M lifts the extensions above the lid. Downturned eyes do better with the outer corner one size shorter so the set doesn't drag the eye down. Round eyes look longer with a cat eye or squirrel, and rounder still with a doll eye. Almond eyes suit nearly everything.
Our L vs LC vs M curl guide covers the lifted curls in more detail.
5. Beginner Mistakes
Mapping lying down. The pupil mark moves when the client reclines. Mark it with them sitting up and looking straight ahead.
Copying one eye onto the other. Mirror the map, then look again. Natural lashes are rarely identical side to side.
Going too long. Beginners pick the length that looks good on the tray, and the natural lash pays for it. Our retention checklist explains how length and weight affect how long a set lasts.
Not saving the map. Without it, the next fill starts from guesswork. Staple the printed map to the client card.
One more thing before you take paying clients. In many states, eyelash extensions need a license. Texas, for example, says only licensed individuals can perform them. Check your own state board.
Lash Mapping Checklist
- Natural lashes checked on both eyes, sitting up.
- Style agreed and written on the card.
- Inner corner, pupil center and outer corner marked.
- Peak chosen for the natural lashes, not the tray.
- Steps of 1 to 2 mm between zones.
- Map saved for the next fill.
FAQ
How many zones should a lash map have?
There's no single standard. Five to seven is common. Seven is enough to shape every basic style and still quick to read during application.
What is the easiest lash map for beginners?
Natural. It follows the client's own growth pattern, short at the inner corner and gradually longer, so small mistakes don't show much.
Should both eyes use the same lash map?
Usually yes, mirrored. If the natural lashes differ between eyes, adjust the lengths for each eye.
Mixed-Length Trays for Mapping
Mix 8–16 mm trays put every length of a beginner map in one tray. Map your next set in the free Lash Map Generator, or browse all lash extensions. Online orders have no minimum order, and new customers can use code COMELY10 for 10% off.