The term PRINTING MEASUREMENT is often used in the printing industry and refers to the unit of measurement used to measure the size of a printed piece. PICA is a common unit of measurement used in the printing industry, and it stands for 'Picas Per Inch'. It is equal to 1/6 of an inch, or approximately 0.166 inches. PICA is often used to measure the size of a printed piece, such as a book, magazine, or newspaper.