Human hair growth a new strand of hair begins to form. The rate or speed of hair growth is about 1.25 centimetres or 0.5 inches per month, or about 15 centimetres or 6 inches per year. The anagen phase is known as the growth phase. This is the phase where the hair physically grows approximately 1 cm per month. It begins in the papilla and can last from two to six years. The span at which the hair remains in this stage of growth is determined by genetics. The longer the hair stays in the anagen phase, the longer it will grow. During
Afro-textured hair square centimeter. This was significantly lower than that of Caucasian hair, which, on average, has approximately 227 hairs per square centimeter. Loussourarn found that afro-textured hair grows at an average rate of approximately 256 micrometers per day, whereas Caucasian hair grows at approximately 396 micrometers per day. In addition, due to a phenomenon called 'shrinkage', afro-textured hair that is a given length when stretched straight can appear much shorter when allowed to naturally coil. Shrinkage is most evident when afro-hair is (or has recently been) wet. The more coiled the hair texture, the higher its shrinkage. An individual hair's shape