The flag of Montenegro (Montenegrin: Застава Црне Горе, romanized: Zastava Crne Gore) has a red field with gold border and the coat of arms of Montenegro in its center. It was officially adopted on 13 July 2004, when the then Republic of Montenegro was a constituent of the State Union of Serbia and Montenegro, and its precise specification was standardized on 16 September 2004. The flag was retained after Montenegrin independence in 2006, and mandated by Article 4 of the Constitution of Montenegro adopted in 2007. The flag of Montenegro is red, with the coat of arms in the middle, and golden borders. The ratio of the flag is 1:2. The coat of arms takes up 2⁄3 of the flag's height. The middle point of the coat of arms matches the middle point of the flag. The width of the border is 1⁄20 of the flag's height. Two versions of the Montenegrin flag are in use, horizontal, mostly used outdoor; and vertical, mostly used indoor. (Source: Wikipedia.org, CC BY-SA)