Height varies a lot around the world — and some countries have a definite lead.

Using medical data, INSIDER calculated average height figures for the 25 tallest countries — which skews heavily towards nations in Europe.

Scroll down to see the nations with the tallest people on earth.

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The world's tallest man clocks in at 251cm (8 feet 3 inches) and he's called Sultan Kösen, from Turkey.

But despite his commanding size, his compatriots don't quite make the list of countries with the tallest people on average.

INSIDER used average height data from a medical database run by NCD Risk Factor Collaboration, a project linked to Imperial College London.

It lists separate figures for male and female height in each country — we took an average of these two figures to give a rough idea of how tall the average person is in the country, and also listed the separate male and female figures.

Scroll down to see the 25 countries which (literally) came out on top.