Slovenia is about 13 times smaller than Colorado.

Colorado is approximately 268,627 sq km, while Slovenia is approximately 20,273 sq km, making Slovenia 7.55% the size of Colorado. Meanwhile, the population of Colorado is ~5.0 million people (2.9 million fewer people live in Slovenia).
This to-scale comparison of Colorado vs. Slovenia uses the Mercator projection, which distorts the size of regions near the poles. Learn more.

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