Appearance: Fine, barely-there S-waves that start mid-length or at the ends. Hair lies mostly straight at the roots with a gentle bend.

Key Traits: Low volume, easily weighed down by heavy products, can appear "almost straight," very subtle wave pattern.

Appearance: More defined S-shaped waves starting closer to the roots. Noticeable wave pattern throughout, with moderate volume and a slightly tousled look.

Key Traits: Frizz-prone in humidity, waves hold shape but can loosen, medium density.

Appearance: Strong, well-defined waves with some loose spiral curls mixed in. High volume and noticeable texture, often mistaken for curly hair.

Key Traits: Coarser strands, significant frizz potential, waves start at the root, can form ringlets with proper styling.

Appearance: Loose, shiny spiral curls about the diameter of sidewalk chalk. Well-defined ringlets that clump together naturally, with good natural sheen.

Key Traits: Curls start at or near the root, medium density, can be styled straight easily, responds well to moisturizing products.

Appearance: Springy, medium-sized curls about the diameter of a marker pen. Voluminous and bouncy with a mix of ringlets and corkscrews.

Key Traits: High volume, defined curls, moderate to high density, can be frizzy, curls hold their shape well.

Appearance: Tight, well-defined curls about the diameter of a pencil or drinking straw. Dense, voluminous, with corkscrew-shaped coils packed closely together.

Key Traits: High density, significant shrinkage (up to 50%), can feel coarse, prone to dryness, very defined ringlets.

Appearance: Tight, well-defined S-shaped coils about the diameter of a knitting needle. Defined springy coils that retain a clear curl pattern when stretched.

Key Traits: High density, significant shrinkage (50-60%), delicate strands, retains moisture moderately well, coils are visible to the eye.

Appearance: Tight Z-shaped coils with less defined curl patterns. Strands bend in sharp angles rather than forming smooth ringlets, creating a fluffy, cotton-like texture.

Key Traits: Very high shrinkage (up to 70%), extremely delicate, low porosity common, may not form defined clumps.

Appearance: The tightest coil pattern with the most shrinkage (up to 75%+). Very dense with almost no visible defined curl pattern — may appear completely undefined without styling.

Key Traits: Maximum shrinkage, extremely fragile strands, highest density, requires the most moisture, minimal natural definition.

The Andre Walker system categorizes hair into four main types (1-Straight, 2-Wavy, 3-Curly, 4-Coily) with subcategories A, B, and C based on curl tightness and pattern. It's the most widely referenced curl classification system, helping people understand their hair's structure to choose better products and routines.

Absolutely! It's very common to have 2-3 different curl patterns on one head. For example, many people have tighter curls underneath and looser patterns on top, or tighter curls at the crown and looser at the nape. This is completely normal — focus on the dominant pattern for your routine.

The key difference: 2C hair forms S-waves that may occasionally loop into a loose curl, while 3A hair consistently forms full spiral ringlets from root to tip. If your hair forms complete circles/ringlets without coaxing, you're likely Type 3. If the waves are strong but don't fully loop around, you're probably 2C.

4B hair forms sharp Z-shaped angles with little to no defined curl pattern, while 4C hair has an even tighter Z-pattern with the most shrinkage (up to 75%+). 4C is the most fragile hair type and typically shows almost no visible curl definition without styling. 4B may still show some S-pattern when stretched.

Yes! Hormonal changes (puberty, pregnancy, menopause), medications, chemotherapy, aging, and even major stress can alter your curl pattern. Hair can become curlier, straighter, finer, or coarser over time. This is why it's helpful to reassess your curl type every few years.

Type 2 wavy hair: every 2-3 days. Type 3 curly hair: every 3-5 days. Type 4 coily hair: every 5-14 days. The tighter the curl, the less frequent washing is needed because natural oils travel more slowly down the hair shaft. Co-washing (conditioner-only washing) between shampoo days works well for Types 3-4.

Type 2: Heavy butters, thick oils, rich creams (weigh waves down). Type 3: Sulfates, drying alcohols, heavy silicones without clarifying. Type 4: Sulfates, mineral oil, petrolatum-heavy products (can block moisture), and lightweight formulas that don't provide enough moisture.

Shrinkage is the difference between your hair's stretched length and its natural state. It's actually a sign of healthy, elastic hair! Type 4 hair can shrink up to 75%. While some embrace shrinkage, others stretch their hair with banding, twisting, or blow-drying for length — both are valid choices.

On a global scale, Type 1 (completely straight hair) and Type 4C are both relatively rare. Among curly types, true 4C hair with maximum shrinkage and almost no visible definition is less common than Types 3A-3B. However, rarity varies significantly by ethnicity and geographic region.

Yes. Repeated high-heat styling without protection can permanently alter the protein structure of your hair, causing curls to loosen or disappear entirely — this is called heat damage. The only way to fully restore the natural pattern is to cut off the damaged hair and let new growth come in. Always use a heat protectant.