Comments on the question, too good to lose, so into a community wiki:

You should probably be country specific. It is called differently (and “pint” is different volume) even in different states of Australia: ournakedaustralia.com.au/drink-australian-beer-sizes – Jay Random Jul 5 at 9:21

Most places that regularly serve tourists will understand the english word pint as a measure for draft beer. In many countries that equates to a larger than normal serving size, except maybe in Germany's beer halls where that is a small glass compared to the normal 1 L Maß – HBruijn Jul 5 at 9:26

When it's draught, you'll probably see a volume indication, such as 400ml, 500ml, 50cl etc., and that's what you ask. Half or Third works fine. – yoki Jul 5 at 9:28

Yes, this is country-specific. You might ask for half a litre or for a 'large' beer might be the local way to request the same quantity. – Martin Jul 5 at 9:31

In some places half a litre is a large beer, in other places a Mass is a large beer :) – Bernhard Döbler Jul 5 at 12:46

In Israel it's a 'half' (500cc) or a 'third' (330cc). Don't know if it works on other metric countries. – ugoren Jul 5 at 14:08

In France, the traditional serving in a bar is un demi (which actually is 25 cl). A 50 cl glass can be asked as une pinte (with French accent), une chope, un baron or un distingué. – audionuma Jul 5 at 14:38

A pint isn't the same in the US and UK—it is 16 US fluid ounces in the US system (473 mL) and 20 Imperial fluid ounces in the Imperial system (568 mL). Canada follows the Imperial system here, but because pint glasses are largely made in U.S. sizes, you might order a pint in Canada but actually get a sleeve of 16 Imperial fluid ounces (455 mL). – choster Jul 5 at 17:24

In Sweden just ask for "en stor stark". A big strong one. It will likely be between 400 and 500 ml. Unless it is some special bar or festivity you won't get bigger than that. – mathreadler Jul 5 at 17:29

A New Zealand-specific answer: stuff.co.nz/dominion-post/7621775/… nzherald.co.nz/nz/news/article.cfm?c_id=1&objectid=10747816 – Thomas 2 days ago

Isn't 500 ml a metric pint? – RonJohn 2 days ago

In Germany it's a half; "eine Halbe". – RedSonja 2 days ago

In warmer countries only tourists order large beers. The reason is that it's so hot that if you order a pint then it'll lose its chill before you've had time to drink half of it. Here, we order half the amount but twice as frequently :-) – Aaron F 2 days ago

Don't ask for a "stein"! – ohno 2 days ago

In Canada, you can order a pint (in French, une pinte). Though as @choster mentioned, the size might vary. I think I've even seen European import glasses which are 500ml. – wjandrea yesterday

@wjandrea in Quebec une pinte is actually 40 imperial ounces, or 2 English pints. order a chopine instead. – njzk2 yesterday

@njzk2 Hmm, other people have mentioned that in this thread, but it's not correct. Dieu de ciel for example lists a pinte as 16oz, and in my experience a chopine is only used for dry goods like berries, tomatoes, etc. (I live in Montreal btw.) But on the other hand, all the official resources I've found agree with you. – wjandrea yesterday

I Norway: "En halvliter (øl)" (One half-liter (of beer)). You can of course specify brew (eg. "pils") or brand (eg. Ringnes) instead of just "øl" (beer). Though just saying "en halvliter" should suffice. – Baard Kopperud 21 hours ago

I don't drink, but on the odd occasion I've been to a pub with friends they usually just ask for a "four-X gold". It appears to come in single size of glass bottle. – Clonkex 12 hours ago

@AaronF This is fine. Having grown up in the UK I actually prefer beer at room temperature. XD – Vality 41 mins ago