Country size comparison

compared to

Slovakia is about 1.6 times bigger than Belgium.

Belgium is approximately 30,528 sq km, while Slovakia is approximately 49,035 sq km, making Slovakia 61% larger than Belgium. Meanwhile, the population of Belgium is ~11.8 million people (6.4 million fewer people live in Slovakia).
Tip: This to-scale comparison of Belgium vs. Slovakia uses the Mercator projection, which distorts the size of regions near the poles.
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