As Yahoo! News – And the Tallest Nationality Is… points out, the Dutch are the tallest nation on earth, with Dutch men averaging 6’1″:
The market research organization GfK said Thursday that data collected over the last seven years showed increasing demand for larger clothing sizes in the Netherlands, where the average man is about 185 cm (6 foot 1 inch) tall.
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The Dutch are nearly 10 cm (four inches) taller on average than the British and Americans, and almost 15 cm (six inches) taller than they were four decades ago.