“…Mean thickness of the hairs is 15.1 µm, with border values of 10.9 µm for hair number 1 and of 22.2 µm for hair number 3 ; so, they are extremely thin. Napoléon' hairs are thin [5]. The hairs studied here, located in the inter-eyebrowed region of the mask, can be eyebrows ; we know that, in men, eyebrows are thinner (except for white eyebrows, which are thicker) than hairs.…”