Czech Republic is about 1.6 times bigger than Slovakia.

Slovakia is approximately 49,035 sq km, while Czech Republic is approximately 78,867 sq km, making Czech Republic 61% larger than Slovakia. Meanwhile, the population of Slovakia is ~5.4 million people (5.3 million more people live in Czech Republic).
This to-scale comparison of Slovakia vs. Czech Republic uses the Mercator projection, which distorts the size of regions near the poles. Learn more.

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