<human>: Is it possible to get a tattoo with a needle that's smaller than a human hair?
<bot>: Yes, it is possible to get a tattoo with a needle that's smaller than a human hair. Tattoo needles are typically between 0.2mm and 1.5 mm in diameter. Human hair is typically around 25-35 microns in diameter. So it is possible to get a tattoo with a needle that's smaller than a human hair.