This system categorizes 12 hair types using a numbering system (1 through 4) based on the natural curl pattern. These types are further classified into subgroups depending on hair thickness using ...

“The numbers 1 to 4 refer to curl families, and the letters (A to C) indicate how tightly wound the actual curls are. So, type 1 hair has basically no curls or is straight, type 2 has ...