The Ligne, or French Ligne, is a unit of measurement you’ll sometimes overhear in the hat business when referring to hat bands. Since hat band widths is the only place I’ve ever heard it used, and I was surprised to find so little online about it, I made a converter for converting between inches and lignes.
Next time you’re browsing through a hat manufacturer’s catalog and see a 12 ligne hat band, you can use the converter to get an exacting measurement in inches.


