St. Kitts and Nevis is 2.9 times larger than Anguilla.
Area: 91 km2 World Factbook
Population: 16,086 (July 2014) World Factbook
Anguilla is a British overseas territory in the Caribbean. It is one of the most northerly of the Leeward Islands in the Lesser Antilles, lying east of Puerto Rico and the Virgin Islands and directly north of Saint Martin. Wikipedia
Area: 261 km2 World Factbook
Population: 51,538 (July 2014) World Factbook
The Federation of Saint Christopher and Nevis, located in the Leeward Islands, is a federal two-island country in the West Indies. It is the smallest sovereign state in the Americas, in both area and population. Wikipedia