Since I have been in Belgium I can tell you that the flemish (the tallest part of Belgium according to studies) average is no more than 176-77 cm (absolute max 178)
most average are overestimated
they were exactly the same as french, if not shorter. I was chocked because I really believed they were giants
so the 181,5 cm of average make me laugh
I also have been in Macedonia. They weren't taller than French
I dont understand why French have the reputation of short guys (I noticed that many english and eastern european believe it and it come from Napoleonian wars), while in my experience this is not the case. Norwegian, irish, belgian, macedonian, albanian, english, swiss are not taller from my experience and if they are this is about 4cm at best. Albanian and turkish are clearly under french average
of course, this is only what I have seen with my eyes, so no scientific proof. But in that list czech are probably the most accurate from my experience
In the future I hope to visit Netherlands, Lithuania, Slovakia, Poland, Belarus, Serbia, Ethiopia and if possible South Sudan (but it looks at bit too expensive and difficult) to have my own opinion. Travelling in Europe is cheap, so let's do it.
it seems that European people are all insecure, even more English or American, so making something good will be difficult. But some average are good, for exemple something between 174,5 and 177 is probably true for France. Under that this is too low, and above this is too high.
Studies showed the Dinka-Nuer average as 176 cm, if you live in UK, Australia or the USA you can meet the diaspora to have your opinion. This is not the only ethnicity to be quite tall in Africa : Wolof, Tutsis, Masai, etc