A cicero () is a unit of measure used in typography in Italy, France and other continental European countries, first used by Pannartz and Sweynheim in 1468 for the edition of Cicero's Epistles, Ad Familiares. The font thus acquired the name cicero.
It is of the historical French inch, and is divided into 12 points, known in English as French points or Didot points.
It is thus similar to an English pica, but as the French inch was slightly larger than the English inch is; there are about 1.063picas to a cicero.