Jamaica is 42 times larger than Cayman Is..
Area: 264 km2 World Factbook
Population: 54,914 (July 2013) World Factbook
The Cayman Islands are a British Overseas Territory in the western Caribbean Sea. The territory comprises the three islands of Grand Cayman, Cayman Brac and Little Cayman, south of Cuba and northwest of Jamaica. Wikipedia
Area: 10,991 km2 World Factbook
Population: 2,930,050 (July 2014) World Factbook
Jamaica is an island country situated in the Caribbean Sea, comprising the third-largest island of the Greater Antilles. Wikipedia