United Kingdom is about 3.1 times bigger than Czech Republic.

Czech Republic is approximately 78,867 sq km, while United Kingdom is approximately 243,610 sq km, making United Kingdom 209% larger than Czech Republic. Meanwhile, the population of Czech Republic is ~10.9 million people (58.6 million more people live in United Kingdom).
Tip: This to-scale comparison of Czech Republic vs. United Kingdom uses the Mercator projection, which distorts the size of regions near the poles.
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