Cayman Is. is 47% larger than Aruba.
Area: 180 km2 World Factbook
Population: 110,663 (July 2014) World Factbook
Aruba is an island 33 kilometres long; it is located about 1,600 kilometres west of the Lesser Antilles in the southern Caribbean Sea and 27 kilometres north of the coast of Venezuela. Together with Bonaire and Curaçao, it forms a group referred to as the ABC islands. Wikipedia
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