Coarse hair is stronger, for obvious reasons - it has more substance. However, coarse hair can also be harder to process, and can be resistant to haircoloring services, perming, and straightening. Fine hair, conversely, is often very easy to process, and can be over-processed easily and is susceptible to damage from chemical services.
typically this is how to will be able to tell the diameter of your hair. Now there is also the density of your hair, thin/medium/thick. Density is the amount of hairs per square inch of your head.
Now, examples: pubic hair is typically course. The "blond" hairs on your body are vellus, but are also closer to being thin. Range the diameter of your hair by those two examples will help determine the texture (coarse, medium, fine).
The average head has approximately 2,200 strands of hair per square inch, and a total of approximately 100,000 hairs.( which would be medium density).
at 10:25 PM on Jun. 27, 2010