Cambodia is about 2.3 times bigger than Maine.

Maine is approximately 79,931 sq km, while Cambodia is approximately 181,035 sq km, making Cambodia 126% larger than Maine. Meanwhile, the population of Maine is ~1.3 million people (15.4 million more people live in Cambodia).
Tip: This to-scale comparison of Maine vs. Cambodia uses the Mercator projection, which distorts the size of regions near the poles.