Cambodia is around the same size as Nebraska.

Nebraska is approximately 199,099 sq km, while Cambodia is approximately 181,035 sq km, making Cambodia 90.93% the size of Nebraska. Meanwhile, the population of Nebraska is ~1.8 million people (14.9 million more people live in Cambodia).
Tip: This to-scale comparison of Nebraska vs. Cambodia uses the Mercator projection, which distorts the size of regions near the poles.