Boston is 2.5 times larger than Yonkers, New York.
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
Area: 53 km2 calculated
Yonkers is the fourth most populous city in the U.S. state of New York, and the most populous city in Westchester County, with a population of 195,976. Wikipedia