You write that Napoléon was two decimetres (eight inches) shorter than many people think. Léon is described as noticeably taller and less than an inch shorter than Ian Holm. Which heights do you imagine?
I estimate Napoléon’s height to 1.48 meter (4 feet 10). This is based on this portrait. Yes, I did take into account that he is leaning slightly forwards. Ian Holm I estimate to 1.56 meter (5 feet 1). This is based on a photo taken in connection with the shooting of Alien. The fictitious Léon I imagined to be 1.54 meter (4/5 inch shorter). This is because he grows up under considerably cleaner conditions.