Hum, are you in the Netherlands? 188cm is definitely tall in pretty much everywhere. 193cm, you're probably in the top 1% in everywhere except two or three countries.
Well, I took a look after posting that comment, and this is what I found: http://en.wikipedia.org/wiki/Template:Average_height_around_... -- sort by the first column descending, skip all the N/A items (I'm not sure why would they miss all that data for men when it's perfectly available for women) and you'll find my origin at the top of the actual results. I guess that might explain a lot.