It may be dependent upon local custom, but what scales are used to measure beer? Is there one in particular that is used globally, or could be said to be specific to beer or alcoholic drinks?
Typically, I see either pints or whatever the local standard of measurement for liquid is (say, fluid ounces or milliliters) so this isn't really a global standard.
Serving sizes also aren't standard; in my country alone, if you go to a pub and ask for a pint or a schooner, the size will depend on what state you're in.
However, I have seen the measurement
l (lower-case L) used. Is this litres, or something else?