>According to professional print service Quality Logo Products and Same Day Printing, the smallest font size used for promotional or printed items is 6pt which is equivalent to 0.6mm+. If the font’s any smaller, you might need to zoom in to read the print, the service says.
>However, according to an online printing service Jukebox, “there isn’t a single answer to determine the smallest font size that can be used in every design.” Jukebox suggests a few factors that must be considered in a design: font style, line weight or thickness, printing process, legibility and final print size.
>Line thickness matters when it comes to choosing a font size that’s legible, especially for physical printing. Same Day Printing recommends a minimum line thickness of 0.25pt to 0.5pt as it makes up the thickness or width of each individual line from the letter.
