California is about 4.7 times bigger than Azerbaijan.

Azerbaijan is approximately 86,600 sq km, while California is approximately 403,882 sq km, making California 366% larger than Azerbaijan. Meanwhile, the population of Azerbaijan is ~10.4 million people (26.9 million more people live in California).
Tip: This to-scale comparison of Azerbaijan vs. California uses the Mercator projection, which distorts the size of regions near the poles.