Who has the most hair? Typically, blondes average the highest density, with about 140,000 strands of hair. Next are the brown-haired ones, with 110,000; then black-haired with 108,000; and finally redheads, with only about 80,000.
Understanding your hair density (which refers to strands per square inch) and the hair type (which has to deal with the individual strand) can help you choose the right products and the right cuts and that can make all the difference. We explain all that in Live Curly Live Free: Unlocking the Secrets Behind the World of Beautiful Curly Hair.
If your hair is fine but thick, for example, the texturized razor cut works. But try that on fine thin hair, and the look could be disastrous.
For products, gels work best on very thick hair, because they help minimize the volume; and mousse works better on thin hair, because it helps add the appearance of volume.