Flag of the Islamic Emirate of Afghanistan (Taliban), introduced in 1997
The ratio is 1:2, according to the September 1997 Amendments to the Flag Law. The script of the Shahada is not specified in the flag law and varies (see 'other versions' below). This design is one of the most common, and is featured on the Taliban's official website, on a mural at the old U.S. Embassy, and is raised over the presidential palace and Kabul airport.
Original: Taliban Vector:  Lexicon