How to Tell Your Actual Curl Type (It’s Not Just 3A vs 3B)

Somewhere along the way, curl typing turned into a personality quiz. 2C, 3A, 3B, 4C; people search their pattern like a horoscope, hoping the letter and number will finally explain why their hair does what it does. And to be fair, the system is a useful starting point. But it’s just that: a starting point, not the whole story.

If you’ve ever matched your curl chart type perfectly and still felt like your products weren’t working, this is why.

The Chart Only Measures One Thing: Shape

The 2–4 curl typing system is really just describing the shape your strand naturally forms: wave, curl, or coil, and how tight that curl is. That’s genuinely useful information. But shape alone doesn’t tell you how your hair will behave with product, water, or styling. Two people with identical 3B curls can need completely different routines, because shape is only one piece of the puzzle.

The Piece Everyone Skips: Porosity

Porosity is how easily your hair absorbs and holds onto moisture, and it comes down to how open or closed your cuticle is.

• Low porosity hair has a tighter cuticle. Moisture takes longer to get in, but once it’s there, it tends to stay. Products can sit on top and build up instead of absorbing.

• High porosity hair has a more open cuticle. Moisture gets in fast, and leaves just as fast. This hair often feels dry no matter how much product goes on.

Two people with the exact same curl shape but opposite porosity need almost opposite routines. This is usually the missing piece when a “correct” curl-type routine still isn’t working.

The Piece Everyone Forgets: Density

Density is simply how many strands you have per square inch of scalp, and is separate from how thick each individual strand is. High density can mean curls hold their shape well but feel heavy fast. Low density often means curls look and feel lighter, and can go flat under too much product.

Density shapes how much product you actually need, and it has nothing to do with your curl chart letter.

So What’s Your Real Curl Type?

It’s really three things layered together: shape (your chart pattern), porosity (how your hair handles moisture), and density (how much hair you’re actually working with). Knowing your letter is a decent opener. Knowing all three is what actually tells you which products, how much, and in what order.

This is exactly why curl type charts alone leave so many people stuck frizzy despite doing “everything right,” or weighed down despite using “the right products for their type.” The chart was never wrong, it was just incomplete.

Where to Go From Here

If you’ve been guessing your way through curl products based on a chart alone, that’s not a you-problem, it’s a chart-problem. A proper curl consultation looks at shape, porosity, and density together, and builds a routine around your actual hair instead of a category it loosely fits into. That’s what a Curl Discovery session is for: figuring out the real story your curls are telling, not just the letter they’d get on a chart.