Sweden is about 2,488 times bigger than Marshall Islands.

Marshall Islands is approximately 181 sq km, while Sweden is approximately 450,295 sq km, making Sweden 248,682% larger than Marshall Islands. Meanwhile, the population of Marshall Islands is ~36,282 people (10.6 million more people live in Sweden).
Tip: This to-scale comparison of Marshall Islands vs. Sweden uses the Mercator projection, which distorts the size of regions near the poles.
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