Lash curls, the reference of the craft
B, C, CC, D, L. These letters look cryptic at first, yet they are one of the very first reference points a technician learns. Here is what they mean, and how to choose the right one.
When you discover the craft, you quickly come across these letters, B, C, CC, D, L, and you wonder if you missed a class. Don't worry, it is simple once you have the right diagram in mind. The curl is the shape of the extension, its degree of lift. And the right choice is never the most spectacular one, it is the one that flatters that particular eye while respecting the natural lash.
- The curl is the shape of the extension, from the straightest to the most curled.
- From B to L, each curl gives a different effect.
- You choose it based on the natural lash and the desired effect, not by default.
What is a curl, concretely
Picture an extension seen in profile. Some are almost straight, others lift sharply upward, like a lash curled with an eyelash curler. That degree of shape is the curl. The further the letter goes in the craft's alphabet, the more curled the extension. It is a visual reference that every beginner learns in the very first hours.
The five reference curls
The B gives the most natural effect, a slight lift that wakes up the eye without transforming it. The C is the great classic, the most requested shape, lovely on most eyes. The CC pushes the curl one notch further, more presence. The D opens up the eye to the maximum, very curved, perfect for lifting lashes that droop. The L has a straight base then a sharp lift, ideal for the fox eye effect and for hooded eyelids, because its angle draws the eye upward.
“The right curl is never the most spectacular one. It is the one that respects the lash while flattering the eye.
How to choose the right curl
It all starts with two questions. First, how do the client's natural lashes grow? Straight or downward lashes need a more pronounced curl, like the D or the L, to open up the eye. Already curled lashes are fine with a C. Then, what effect does the client want? Natural, open, lifted. The curl is chosen at the intersection of these two answers, never at random or out of habit.
The trap to avoid
The classic beginner's mistake is to apply the most curled shape to create a "wow" effect. A curl that is too strong on a straight natural lash holds poorly, because the contact surface between the extension and the lash is reduced, so the extension lifts off faster. The result is a set that does not last, and a disappointed client. Adapting the curl to the lash is not limiting yourself, it is protecting how well your set holds.
The curl in one sentence
You do not choose the most curled shape. You choose the one that opens up the right eye while holding on that particular lash. It is the balance between the effect and the hold.
Hélène B
Trained within a world-renowned international brand. 13 years of experience in lash extensions, including 10 years as a trainer, and more than 500 technicians trained in France and abroad.
Master the choice of curls
Our classic and Russian volume trainings teach you to read an eye and choose the right curl, with the support of a trainer. Independent, yes. Alone, never.
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