You brought a photo, you explained that you wanted about an inch off, and you left the chair with your hair at shoulder length instead of at your shoulder blades. Nobody lied to you. Wet, with the comb pulling, the length that fell on the floor really was what the two of you agreed on. What was never agreed on is what happened when the hair dried and every strand went back into its own spiral.
This is the most common complaint about haircuts on curly hair, and it is almost never about centimeters. It is about the professional and the client looking at two different shapes of the same head of hair.
There is no one right technique for every curl
The internet sold the idea that a dry cut, curl by curl, is the correct technique, and that a wet cut is what people who do not understand curls do. That is false in two ways.
There are excellent professionals who have been cutting curls wet and delivering predictable shape for twenty years. And there are mediocre dry cuts, done on hair that was flattened from sleeping on it, that came out unbalanced precisely because the professional trusted a shape that was not that hair’s usual shape.
What separates a good result from a bad one is not whether there is water involved. It is whether the professional saw the curl in the shape you actually wear, and whether the cut respected that shape.
Shrinkage is not a number, it is a range
Hair absorbs water up to nearly a third of its own weight. Wet, the fibre is swollen and flexible: it will stretch well beyond the length it settles into when dry, and it comes back without breaking. What allows this are the hydrogen bonds, weak links inside the keratin that water undoes and drying rebuilds. It is the same mechanism that makes blow dried hair curl up again in the rain.
So wet, stretched length is not your hair’s length. It is one of the possible lengths, and the only one you never wear out on the street.
The difference between the two varies a great deal. In loose waves it is modest. In tighter curl patterns, it is not unusual for the dry length to show up at less than half the stretched length. And, worse for whoever is cutting, the difference is not the same all over the head: the nape, the crown and the hairline usually have different curl patterns on the same person, plus different density and different porosity. Porosity, here, is how easily the cuticle lets water in and out, and it changes how much the strand swells.
Cut ten centimeters (about four inches) with the comb at maximum tension in a high shrinkage area and what you removed, in dry form, is a good deal more than ten.
The variable nobody agrees on: tension
Tension is how hard the hair is being pulled at the moment the scissors close. That, and not the water, is what decides whether the final length matches what was agreed.
You can cut with tension on dry hair: just stretch the section with a comb, as if it were straight. You can cut without tension on wet hair: separating the section with your fingers, letting the spiral form, cutting where it ends. Water makes traction easier, which is why the “wet plus comb” pairing is the most treacherous one. But the problem is the traction.
If you ask only one question before the first snip, ask this one: how much are you going to stretch my hair to cut it, and how do you account for what it springs back to afterwards?
Three ways to cut, and where each one fails
| Method | What the professional sees | Main risk | Tends to work better on |
|---|---|---|---|
| Wet, stretched with a comb | Maximum length, a clean geometric line | Unaccounted shrinkage: more comes off than agreed, and unevenly around the head | Loose waves, blunt line cuts, hair with little variation in curl pattern |
| Wet, no tension, styled afterwards | Volume and weight still forming, spiral already visible | Fine tuning depends on a second dry pass that often never happens | Medium curls, changes to structure and volume |
| Dry, curl by curl or section by section | The final shape, curl by curl, where it actually falls | If the hair is not in its usual finished state, the reading is of a shape you do not wear | Tight curl patterns, high shrinkage, shaping the outline and the frame around the face |
Notice that no row says “wrong”. Each one says where that choice charges its price.
Dry cutting lies too, if the hair is not the way you wear it
A dry cut is only more honest when the hair arrives styled the way you style it at home. Not blow dried, not tied back since yesterday, not washed at the salon and diffused in a way you never reproduce.
If you always wear it with gel and a diffuser, arrive with gel and a diffuser. If you wear it tied back most of the time and loose twice a week, say so, because the shape that matters is the loose one. If the hair is flattened on one side from sleeping, the professional will compensate for an imbalance that exists only that morning, and the cut will look crooked once the hair goes back to normal.
It is the same logic as the condition of the strand at styling time: the decision has to be made on the real shape, not on a temporary one.
Razors, texturizing and the triangle
Two other decisions affect the result more than dry versus wet does.
The first is the tool. A razor cuts with lateral friction and leaves a more frayed end, with the cuticle more exposed. On wavy hair with a thicker strand, that can take weight off without leaving a visible step. On tight curl patterns, on fine hair or on chemically treated hair, it tends to increase frizz and breakage at the ends, because the tip already arrives less resilient.
The second is weight distribution. Curly hair cut all at one length, with no internal volume removed, forms the classic triangle: flat on top, wide at the base. Texturizing, here, means removing volume from inside the section at chosen points, not thinning the whole end. Done badly, it opens up holes that only show up two weeks later, once the hair settles.
Chemically treated hair stretches more and warns you less
If you have a history of relaxing, coloring or bleaching, the cuticle is more open and the fibre takes up water faster. Wet, that hair stretches with less resistance, which means the same comb tension produces more shrinkage afterwards. It also tends to have uneven elasticity along the length: the ends, which have been through more chemistry and more time, behave differently from the roots.
In that case the conversation changes order. Before deciding on a cutting technique, it is worth knowing whether what you are calling “hair that does not grow” is shrinkage, is breakage, or is both. Shrinkage is shape. Breakage is integrity, and no haircut fixes it.
When the missing length is not a scissors problem
Some signs change the address of the conversation. Circular bald patches, a receding front hairline, pain or burning on the scalp, flaking that comes back within days, shedding that has noticeably increased, strands that snap when you stretch them gently: that is a case for a dermatologist, preferably before any salon protocol. Hair therapy works alongside a medical diagnosis, never in place of one.
If you would like to talk about your case
In the service for curly and coily hair at Nelblack, in Tatuapé, in the East Zone of São Paulo, the decision about cutting dry, wet or in two passes is made after seeing your hair in the shape you actually wear it, and how much each area shrinks is checked before the first snip, not after.
If what bothers you involves breakage, shedding or the scalp, and not only length, there is the trichoscope hair assessment, for R$200 in Brazilian reais, credited in full towards the protocol if you go ahead with it. You follow the trichoscopy on the screen together with the professional. We measure again during or at the last session and compare it with the image from the first day, at no extra cost.
We are open Tuesday to Saturday, 9am to 6pm, by appointment. Tuesday is the day reserved for scalp therapy. We can see you in English, which is useful if you are living in São Paulo or just passing through: the salon is in the Carrão and Tatuapé metro area, a straightforward trip from the center on the red line.