Cooks call thinly cut - like matchsticks - vegetables »Julienne«. I found that was a fitting name for this very narrow typeface. Julienne Slim is the extreme cut of the two. Personally I do not use narrow typefaces very often, but from time to time they come in handy if there is much text to be crammed into little space. I could make a typeface that was even narrower, but I will not do it. This is as narrow as my typefaces get.