TYPE 3 HAIR
3a hair has well defined loopy curls.
3b hair curls are well defined with less space between each bend and curve than 3a hair. The texture may be coarse and dense.
3c hair as a defined corkscrew shape and has the smallest space between the bends in the hair strand of all the type 3 hair types.
TYPE 4 HAIR
4a hair has a defined curl pattern almost like a “s” shape. Generally speaking it retains moisture fairly well, but as with most curly hair types can still be prone to dryness.
4b hair has a “z” shape pattern and has a more fluffy cottony appearance. Due to the bends and curves in the hair strand it is highly susceptible to dryness and breakage. This hair type shrinks up to 70% so without stretching out the hair it will appear shorter than it actually is.
4c hair looks similar to 4b hair type only it is more tightly coiled. In its raw state (no products added and freshly washed) it does not have a defined curl pattern. Coils have to be defined by either twisting, braiding, or shingling through the strands. Many 4c naturals have shrinkage up to 70% or more. So while your hair may be 10 inches long it may appear like you only have 3 inches of hair if you do not stretch your hair out. It is the most fragile hair type. Avoid daily manipulation (combing/brushing) giving hair less chances to break off.
It’s quite common for us to have more than one texture in our hair. Your edges may be 4b while the majority of your hair is 4a type. Or you may have 4a hair with some 3c strands for example. Remember no two heads of hair are alike. Hair type systems are good for learning about your hair or what could potentially be best for it, but they are by no means an absolute standard. Use it as guidance and always go by what you know works best for your hair.