What Does M Mean On Tattoo Needles

M on tattoo needles generally refers to a diameter size and stands for magnums. Magnum needles are generally tattoo needles that are larger than the standard size and are used for shading, larger areas, and for heavier lines with less needle spreading. As magnums typically have more needles than a standard needle, they can facilitate quicker fills for larger areas, which can be important for some types of designs.