Type 3a curls show a definite loopy "S" pattern. Curls are well-defined and springy. Curls are naturally big, loose and often very shiny. 3a curls' circumference are sidewalk-chalk size. Generally, this hair type can be easily straightened. Type 3a hair is very much affected by the climate. Type 3 curlies can use a variety of styling products to achieve curl formation and definition.
Type3b curls arewell-defined, springy, copious curls that range from bouncy ringlets to tight corkscrews. 3b curls' circumference are Sharpie size. Type 3b hair can be straightened, but it can be a long process. Type 3b hair generally isn't particularly shiny and its texture can be quite coarse. Gels and creams work best to reduce frizz and add definition.
Type 3c hair has voluminous, tight curls in corkscrews, approximately the circumference of a pencil or straw. The curls can be either kinky, or very tightly curled, with lots and lots of strands densely packed together. Achieving a straight style with a blow dryer or flat iron is more challenging than it is for 3a or 3b, but it can be done. The very tight curls are usually fine in texture.
Type 4a is tightly coiled hair that has an "S" pattern. It has more moisture than 4b; it has a definite curl pattern. The circumference of the spirals is close to that of a crochet needle. The hair can be wiry or fine-textured. It is very fragile with lots of strands densely packed together. Type 4a hair has fewer cuticle layers than other hair types, which means it has less natural protection from damage.
Type 4b has a "Z" pattern, less of a defined curl pattern. Instead of curling or coiling, the hair bends in sharp angles like the letter "Z". Type 4 hair has a cotton-like feel. The hair is very wiry, very tightly coiled or bent and very, very fragile; you must take great care when caring it. Type 4 hair can range from fine/thin to wiry/coarse with lots and lots of strands densely packed together. Type 4b hair often shrinks up to 75% of the actual hair length.
Type 4c hair is composed of curl patterns that will almost never clump without doing a specific hair style. It can range from fine/thin/super soft to wiry/coarse with lots of densely packed strands. Some say 4c looks identical to 4b except that the curls are more tightly kinked, there is much less definition than other hair types. 4c hair can shrink more than 75%.