Indian Curly Hair Types Actually Explained: Why the Western Chart Gets It Wrong

The Andre Walker hair typing system, the 1-to-4, A-to-C grid that dominates every curl forum and shampoo label, was developed in the early 1990s in the United States, primarily to categorise the hair textures of Black and white American women. Indian hair was not in the room. The curl patterns common across South Asia, from the loose, heat-flattened waves of a Punjabi woman to the tight, undefined coils of someone from Tamil Nadu, do not sit cleanly inside any of its boxes. Forcing them in produces bad advice: products recommended for 3C hair that turn an Indian 3C into a frizzy, crunchy mess, because the chart does not account for the specific porosity and density profiles that Indian hair tends to carry.
Indian curly hair generally falls into four recognisable patterns, none of which map perfectly onto the Western chart's letters and numbers.The first is the wavy-frizzy type: hair that appears straight when wet, forms a loose S-wave as it dries, then expands into a wide, diffuse frizz cloud by the time it is fully dry. This is extremely common and almost always misread as "damaged straight hair" rather than a genuine wavy texture. The second is the S-curl type: defined, springy curls that form a clear S-shape from root to tip, hold their pattern in low humidity, but swell and separate in the monsoon months. This hair is often closest to what the Western chart calls 3A or 3B, but its porosity behaviour is different enough that 3A product routines frequently fail on it.The third is the coil type: tight, small-circumference curls that shrink dramatically when dry, sometimes to half their wet length. This pattern is common in parts of South India and among communities with East African ancestry. It is closest to 4A on the Western chart, but the Western 4A routine, which typically involves heavy butters and creams, often weighs down Indian coils because Indian hair in this range tends to have lower density per strand even when overall volume looks high.The fourth is the undefined curl: hair that forms no consistent pattern, with sections of wave, sections of coil, and sections of near-straight all on the same head. This is not a curl type the Western chart acknowledges at all. It is, however, one of the most common Indian curl presentations.
Porosity, how readily the hair shaft absorbs and holds moisture, explains more about how Indian curly hair behaves than any curl-pattern number does. Indian hair, across curl types, tends toward low-to-medium porosity. The cuticle layer lies relatively flat, which means water takes longer to absorb but also takes longer to escape. This is why Indian hair can feel dry on the surface while retaining moisture underneath, and why heavy occlusives like shea butter often sit on top of Indian curls rather than sealing anything in.A simple porosity test: drop a clean, dry strand into a glass of room-temperature water. If it floats for more than two minutes, your porosity is low. If it sinks immediately, it is high. Most Indian curly hair floats. That single result changes the entire product logic: low-porosity hair needs heat or steam to open the cuticle before conditioning, and it responds better to lighter humectants like aloe vera or glycerin than to thick creams.The Western chart has no porosity axis. It measures curl shape only. Shape tells you what your hair looks like. Porosity tells you how it behaves.
Indian curly hair exists in a climate the Western chart's country of origin does not share at scale. The monsoon season, and the general high-humidity baseline across coastal and peninsular India, means that frizz for Indian curly hair is not a product failure, it is a structural response to atmospheric moisture. Hair with low-to-medium porosity and a raised cuticle from humidity absorbs ambient water vapour unevenly, causing the outer layer to swell while the inner cortex stays relatively stable. The result is frizz.Anti-humidity products formulated for American or European climates are typically designed for cold-dry or temperate-humid conditions. They underperform in 80 to 90 percent relative humidity, which is a normal August morning in Chennai or Mumbai. Indian curly hair in high humidity responds better to curl-sealing techniques, applying a light oil like cold-pressed coconut oil or pure argan oil over wet, conditioned hair, than to anti-frizz serums built for a different climate baseline.

Skip the chart. Use these three questions instead.First: what does your hair do when it air-dries completely without any product? The answer, wave, coil, undefined, or flat, is your baseline curl pattern.Second: does a clean strand float or sink in water? That is your porosity. Low porosity needs lighter products and heat-assisted conditioning. Medium-to-high porosity needs heavier sealants applied quickly after washing, before the cuticle closes.Third: how does your hair respond to the first humid day after a blow-dry? If it reverts within hours, your hair is highly hygroscopic, it pulls moisture from the air aggressively. This tells you that hold products matter more for you than moisturising products, and that your styling routine needs to account for the local climate, not the climate assumed by the product's country of origin.The curl chart gave Indian women a vocabulary for hair they had been told was simply "unruly" or "difficult." That vocabulary was worth having. The problem is that the chart stopped there, at shape, and shape is only the beginning of what Indian curly hair is doing.