Balkans
The Balkans are usually said to comprise Albania, Bosnia and Herzegovina, Bulgaria, Croatia, Kosovo, the Republic of Macedonia, Montenegro, Romania, Serbia and Slovenia, while Greece and Turkey are often excluded. Its total area is usually given as 666,700 square km (257,400 square miles) and the population as 59,297,000 (est. 2002).
Eurosphere
According to Mark Leonard, the Eurosphere includes 109 countries. In Europe, this includes the 28 member states of the EU, applicant countries wishing to join the EU, the Western Balkans, and European Commonwealth of Independent States countries (including Armenia, Belarus, Georgia, Moldova, Ukraine, and transcontinental Kazakhstan). Curiously he does not mention Western European countries such as Norway who are already integrated into the EU's single market. Outside Europe, he lists every African country and every Middle Eastern country, as well as the countries forming the eastern border of the Eurosphere such as Iran, Azerbaijan, Russia, and Central Asia.