Maine is about 2.3 times smaller than Cambodia.

Cambodia is approximately 181,035 sq km, while Maine is approximately 79,931 sq km, making Maine 44.15% the size of Cambodia. Meanwhile, the population of Cambodia is ~16.7 million people (15.4 million fewer people live in Maine).
Tip: This to-scale comparison of Cambodia vs. Maine uses the Mercator projection, which distorts the size of regions near the poles.