It'd be very useful sometimes to be able to specify precisely what gauge string I"m looking for, especially when it's a non-standard instrument, or one where I'm trying to replace a particular string the gauge of which I don't know.

I know there are wire gauge measurers electricians use, but I can't see them being precise enough. And then I suppose I might get hold of a micrometer...

Anyway, I'm sure it's a need other people have come up against, and I hope there's a simple and not too expensive solution.