Cambodia is about 8 times bigger than New Hampshire.

New Hampshire is approximately 23,227 sq km, while Cambodia is approximately 181,035 sq km, making Cambodia 679% larger than New Hampshire. Meanwhile, the population of New Hampshire is ~1.3 million people (15.4 million more people live in Cambodia).
Tip: This to-scale comparison of New Hampshire vs. Cambodia uses the Mercator projection, which distorts the size of regions near the poles.