This is a good segway into explaining my thought process on using global average rather than average of a specific country.I don't know if a worldwide height average makes sense.
You must be registered to see the links
Of course there are also small men in there but heh
The game takes place on Miomali and Nisse. Two made-up islands that are part of an also made-up chain of islands. I haven't really put any thought into where exactly (lat/long) these islands are located on the real-world globe. They are meant to be located in an area that is borderline tropical, but right on the edge, so depending on where you go on the islands, you can see a wide mix of vegetation and forest. Some areas will be sunny and beachy, whereas some other areas will have fjords and mountains.
All that being said, this game doesn't take place in the EU/NA/AU or any real-world location, but the overall populace will be an international mix of sorts. So the height of the average citizen will vary greatly.