Indonesia is 5.8 times larger than Malaysia.
Area: 1,904,569 km2 World Factbook
Population: 253,609,643 (July 2014) World Factbook
Indonesia, officially the Republic of Indonesia, is a sovereign state in Southeast Asia and Oceania. Indonesia is an archipelago comprising 13,466 islands. Wikipedia
Area: 329,847 km2 World Factbook
Population: 30,073,353 (July 2014) World Factbook
Malaysia is a federal constitutional monarchy located in Southeast Asia. It consists of thirteen states and three federal territories and has a total landmass of 329,847 square kilometres separated by the South China Sea into two similarly sized regions, Peninsular Malaysia and East Malaysia. Wikipedia