شین (Shin) is the 13th letter of the Persian alphabet. It is pronounced like the English "sh" sound, as in "shoe." In Persian script, شین is written in a distinctive shape and is used in various words throughout the language. In addition to its role in the Persian language, شین is also used in other languages that utilize the Arabic script, such as Arabic and Urdu. The letter has a numerical value of 300 in Abjad numerals, which is a system used for assigning numerical values to letters in Arabic and Persian.