Jerry, you forgot that the thickness of a hair depends on the the natural hair color. Redhead, blond, brunette and black.
Also the part of the body it came from! eeeek

Dial or digital calipers are not to be trusted to measure any less that +/- .005.
Even mics can not be right, if used by someone that does not know how to use one.

Don

1967 GMC 9500 Fire Ladder Truck
"The Flag Pole"
In the Stovebolt Gallery
1946 2-Ton grain truck
1946 3/4-ton pickup,
1953 1-ton pickup
1957 1-ton flatbed dually,
1954 Pontiac Straight Eight
Of all the things I've lost in my life, I miss my mind the most!