American wire gauge (AWG) question

[albertofenini]

Hi everyone,

I have recently purchased this cable :
https://www.amazon.it/gp/product/B07BZXT...UTF8&psc=1

iT is thin enough to replace broken traces of A PCB, but is too thin to replace the cables that
goes from the battery connectors to the chassis of a classic HP.

I would like now to buy something a little thicker , but I get confused about what size
it should be based on the AWG table, since most of the online articles are sized based on this guide.

https://it.wikipedia.org/wiki/American_wire_gauge

The guide does not list the external diameter of a wire, it's more on the section,
and I'm not able to find a reference between the AWG sizing and the thickness of the wire,
anybody has done this before ?

Thanks for help, Alberto