Another Dad wrote:
I just read the other day that the average height for a man in the Netherlands is 5'11"
Maybe for the girls. Obviously, data sources are not any good. Historically, each country would have good data for men as every man would be measured before entering military service. However, since most countries don't have mandatory military service, you don't have this kind of data source anymore. Also by the military source you got a pretty homogeneous picture. Who has Dutch nationality at age 18 was probably born or at least grew up there. Also I was talking about men at the age of 20, not some data of all men between 20 and 35 or even all men.
Again, go to the Netherlands and look around. Men and women are huge.