Awl needle sizing

[Winterman]

I need some advice on sewing awl needles. They come in various gauges with associated numbers (#5, #6, etc.). How does the numbering system work? Does a lower number designate a smaller gauge needle or vise versa? Also, what are the physical dimensions (widths) of the needles? I have seen 1.5mm, 2mm and so forth.

Any unraveling of this would be greatly appreciated.

Edited August 19, 2018 by Winterman

[immiketoo]

In short, there is no standardization. The only consistency of any tool numbers is from a single maker.  What a number two from on maker means something else entirely from another maker.  I would try to go with the manufacturer who gives physical sizes in mm if you're unsure.  Sadly, I have a half dozen awls on account of this very issue, and no two are the same, even those from the same maker.  A lot of people learn to shape their own awl blades on account go this.