Saint Helena is 4.1 times larger than Waterbury, Connecticut.
Area: 308 km2 World Factbook
Population: 7,776 (July 2014) World Factbook
Saint Helena, Ascension and Tristan da Cunha is a British Overseas Territory in the southern Atlantic Ocean consisting of the island of Saint Helena, Ascension Island and the island group called Tristan da Cunha. Wikipedia
Area: 75 km2 calculated
Waterbury is a city in the U.S. state of Connecticut on the Naugatuck River, 33 miles southwest of Hartford and 77 miles northeast of New York City. Waterbury is located in New Haven County, Connecticut. Wikipedia