Hands to hair widths equation
To convert hands to hair widths:
Multiply the number of hands by 0.5763688760806917
About hands
One hand is equal to 4 inches
About hair widths
A human hair's width varies between 17 and 181 micrometers. The measurement used here is 144th of an inch — around 176 micrometers — it was sometimes used with English units, but is not included in the Imperial system.