Hairs emerging from the scalp are thinner, why?

I have noticed that most of the hairs I shed are thicker at the ends and thinner towards the roots, is this normal?

Second email:  Okay, thanks. I am currently on finasteride so is the fact that I am shedding these hairs a good sign?

First Answer:  No, that shows that the new hairs are miniaturizing as they grow in.  Remember, what emerges from the scalp is the new hair and the end of the hairs are the old part of the hair shafts.

Second Answer:  Finasteride should reverse the hair measurements, meaning that any hairs that fall out influenced by the finasteride should get thicker at the scalp level when they regrow.