Anyone know how aluminum pipe sizes work? Is there some kind of
industry standard that manufacturers follow and you can look up (for
finding wall thickness, telecoping lengths, etc)?

I've seen a couple of tables with specifications, however those seem
to always jump from 1/2" to 3/4" to 1"... at my local hardware store I
can get the 1/8"'s sizes in between (3/8, 5/8, 7/8, etc) which has me
confused. Are those 1/8" based sizes standard, or some kind of non
standard product?