There are thousands of pens in the world made by hundreds of different manufacturers and it got us to thinking as to what the average length of a pen is? There are no set standards that to be classed as a ballpoint pen you must be a certain amount of length in mm, cm or inches.
Yet when you are in a stationery store that sells lots of different pens they all look similar in length. This means that the pen manufacturers must have done testing to find the optimal length of their pens. So we dug a little deeper well actually a lot deeper and looked at the length of the pens that are sold by one of the major online retailers to find out how long is a pen?