Massachusetts (USA) is 86% 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
Massachusetts, officially the Commonwealth of Massachusetts, is a state in the New England region of the northeastern United States. It is bordered by Rhode Island and Connecticut to the south, New York to the west, and Vermont and New Hampshire to the north; at its east lies the Atlantic Ocean. Wikipedia