In message , Christian
McArdle writes
On mainland Europe the contents of a glass of beer is 220mm (yes, very
small, plus with a head!). So tin = 2 glasses

The draught I've had in Europe has always been nominally 250ml, 500ml or
even 1000ml. It is also invariably overfilled well above the line.

Europe's a big and diverse place

beer volumes depend on country, area, type of beer etc

for example, in the north of germany the wusses tend to drink a 200 or
250ml pils, in bavaria, it is usually 300 or 400ml

then you get normal beers which come in 500ml, weizen is 400ml

At the top end is a mass - which is 1litre

I have several hundred bottles of belgian beer out the back which range
from 250 through 330 to 375ml

etc etc ...

--
geoff