Bulgaria is about 1.2 times smaller than Alabama.

Alabama is approximately 131,426 sq km, while Bulgaria is approximately 110,879 sq km, making Bulgaria 84.37% the size of Alabama. Meanwhile, the population of Alabama is ~4.8 million people (2.1 million more people live in Bulgaria).
This to-scale comparison of Alabama vs. Bulgaria uses the Mercator projection, which distorts the size of regions near the poles. Learn more.

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