Convert from ligne [Swiss] to hair's breadth

Unit Definition (ligne [Swiss])
A unit of measurement generally used to determine bangle widths. There are forty lignes to the inch.

Unit Definition (hair's breadth)
The hair's breadth is a common informal unit of distance. Human hairs vary considerably in width, depending on age, color, genetics, and other factors. An average hair is approximately 70 to 100 micrometers (µm) in diameter, so, as a rough standard, a hair's breadth is 100 µm or 0.1 millimeter (mm).