I also want to add that 1 standard drink is something defined by the government / health authorities. This isn't the typical drink Bavarians actually drink. It is used for calculation of blood alcohol level or for medical purposes.
Seems that most beers in Bavaria probably approximately equate to 2 standard drinks, meanwhile a small Pilsener commonly found in the North is about 1 standard drink.
Yes, I know (now). But we don't have this measurement of a "standard drink" at all. An Australian ex-coworker had to explain the term, much to my confusion. By "the standard" I simply meant what you will get if you go to a restaurant (or pub or bar) and order "one beer".
I've never lived in the north, just visited very often, and there it could be different depending on the region, setting. Some also say they feel 500ml is the default, others are more in the 330ml range.