Staten Island (NYC borough) is 35% larger than The Bronx (NYC borough).
Area: 151 km2 calculated
Staten Island is one of the five boroughs of New York City, in the U.S. state of New York, located in the southwest part of the city. Staten Island is the southernmost part of the both the City and State of New York, with Conference House Park at the southern tip of the island and the state. Wikipedia
Area: 112 km2 calculated
The Bronx is the northernmost of the five boroughs of New York City, in the U.S. state of New York. Coextensive with Bronx County, it was the last of the 62 counties of New York State to be incorporated. Wikipedia