Bulgaria is about 5 times bigger than Slovenia.

Slovenia is approximately 20,273 sq km, while Bulgaria is approximately 110,879 sq km, making Bulgaria 447% larger than Slovenia. Meanwhile, the population of Slovenia is ~2.1 million people (4.8 million more people live in Bulgaria).
This to-scale comparison of Slovenia vs. Bulgaria uses the Mercator projection, which distorts the size of regions near the poles. Learn more.

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