i was wondering what everybodys hair thickness is. mine i belive is 4". but my hair was shorter when i measured and it was over a year ago. i will have to check again. anyway, i was just curious since there are so many different types of hair.

Sakina - all you have to do is put all of your hair in a ponytail and take a tape measure and measure the circumference.

My strands are very thick but seriously lacks in density on my scalp.  There are women with a full head of many fine hairs who will have a larger diameter when they put their hair in a ponytail than me.  In 7th grade we all pulled a hair out of our heads and put it under a stetoscope (or whatever it's called) and mine was the thickest. 

Hairdressers spend less time trimming my hair when I have layers and graduated ends than when it's all one length and they have to cut a straight line   Ten years ago I sat in a salon chair for the better part of an hour while a frustrated hairdresser tried to trim ½" off the bottom

Besides insisting on movement, texture, and blah, blah, blah.....I also think this is part of the reason why most hairdressers will insist that I need whispy ends

Right now that it's still a bob length, it's a good thing that the ends fold under themselves because when my hair is wet and hangs straight, it's so clear that the ends aren't straight.