Myanmar is 3.7 times larger than Cambodia.
Area: 181,035 km2 World Factbook
Population: 15,458,332 (July 2014) World Factbook
Cambodia, officially known as the Kingdom of Cambodia and once known as the Khmer Empire, is a country located in the southern portion of the Indochina Peninsula in Southeast Asia. Wikipedia
Area: 676,578 km2 World Factbook
Population: 55,746,253 (July 2014) World Factbook
Burma, officially the Republic of the Union of Myanmar, commonly shortened to Myanmar, is a sovereign state in Southeast Asia bordered by Laos, Thailand, China, Bangladesh, and India. Wikipedia