Also common for measuring thickness for films and foils: https://en.wikipedia.org/wiki/Thousandth_of_an_inch#Contexts_of_use https://en.wikipedia.org/wiki/Thou

Also common for measuring thickness for films and foils: https://en.wikipedia.org/wiki/Thousandth_of_an_inch#Contexts_of_use https://en.wikipedia.org/wiki/Thousandth_of_an_inch#Contexts...