Costa Rica is 3.7 times larger than Puerto Rico.
Area: 51,100 km2 World Factbook
Population: 4,755,234 (July 2014) World Factbook
Costa Rica, officially the Republic of Costa Rica, is a country in Central America, bordered by Nicaragua to the north, Panama to the southeast, the Pacific Ocean to the west, the Caribbean Sea to the east, and Ecuador to the south of Cocos Island. Wikipedia
Area: 13,790 km2 World Factbook
Population: 3,620,897 (July 2014) World Factbook
Puerto Rico, officially the Commonwealth of Puerto Rico, is an unincorporated territory of the United States, located in the northeastern Caribbean east of the Dominican Republic and west of both the United States Virgin Islands and the British Virgin Islands. Wikipedia