The term 'Printers Measure' is a unit of measurement used in the printing industry. It is composed of four parts: PICA (4 letters), EM (2 letters), EN (2 letters) and ENS (3 letters). PICA is a unit of measure equal to 1/6 of an inch, EM is a unit of measure equal to the width of a capital letter M, EN is a unit of measure equal to half the width of an EM, and ENS is a unit of measure equal to half the width of an EN. Together, these four units of measure are used to measure the size of type and other elements in the printing process.