Cambodia is around the same size as North Dakota.

North Dakota is approximately 178,647 sq km, while Cambodia is approximately 181,035 sq km, making Cambodia 1% larger than North Dakota. Meanwhile, the population of North Dakota is ~672,591 people (16.0 million more people live in Cambodia).
Tip: This to-scale comparison of North Dakota vs. Cambodia uses the Mercator projection, which distorts the size of regions near the poles.