I got kicked out of the pub.
I ordered a pint and the barman gave me two middies.
I tried to point out that an imperial pint is equal to 586ml and that the standard Australian middy is 285ml. Hence two middies is 570ml and therefore the barman was incorrect by 16ml, which is rounded up to almost half a finger.
It was at that point that I was escorted from the premises and I have not been permitted back since.