Slovakia is 4.5 times larger than Kosovo.
Area: 10,887 km2 World Factbook
Population: 1,859,203 (July 2014) World Factbook
Kosovo is a partially recognised state in Southeastern Europe, which declared independence from Serbia in February 2008 as the Republic of Kosovo. While Serbia recognises the Republic's governance of the territory, it still continues to claim it as its own Autonomous Province of Kosovo and Metohija. Wikipedia
Area: 49,035 km2 World Factbook
Population: 5,443,583 (July 2014) World Factbook
The Slovak Republic is a sovereign state in Central Europe. It has a population of over five million and an area of about 49,000 square kilometres. Slovakia is bordered by the Czech Republic and Austria to the west, Poland to the north, Ukraine to the east and Hungary to the south. Wikipedia