Napoleon was actually average height for the time period and locality. Claims he was especially short were English propaganda that got accepted and survived to the modern day. He was actually 5'6 (168cm).

That’s funny, because the increase in stature for males in the modern day has resulted in 5’6” being “short king” territory today (no pun intended)

So it’s simultaneously true that he was “only 5’6”” and false that he was short for his time.