Singapore is 5.4 times larger than Boston.
Area: 697 km2 World Factbook
Population: 5,567,301 (July 2014) World Factbook
Singapore, officially the Republic of Singapore, is a sovereign city-state and island country in Southeast Asia. It lies off the southern tip of the Malay Peninsula and is 137 kilometres north of the equator. Wikipedia
Area: 129 km2 calculated
Boston is the capital and largest city of the Commonwealth of Massachusetts in the United States. Boston also serves as county seat of Suffolk County. Wikipedia