Tunisia is 2.1 times larger than Serbia.
Area: 77,474 km2 World Factbook
Population: 7,209,764 (July 2014) World Factbook
Serbia, officially the Republic of Serbia, is a country located at the crossroads of Central and Southeast Europe, covering the southern part of the Pannonian Plain and the central Balkans. Wikipedia
Area: 163,610 km2 World Factbook
Population: 10,937,521 (July 2014) World Factbook
Tunisia, officially the Tunisian Republic; is the northernmost country in Africa and, at almost 165,000 square kilometres in area, the smallest country in the Maghreb region of North Africa. Wikipedia