Sri Lanka is about 371 times bigger than District of Columbia.

District of Columbia is approximately 177 sq km, while Sri Lanka is approximately 65,610 sq km, making Sri Lanka 36,968% larger than District of Columbia. Meanwhile, the population of District of Columbia is ~601,723 people (22.6 million more people live in Sri Lanka).
Tip: This to-scale comparison of District of Columbia vs. Sri Lanka uses the Mercator projection, which distorts the size of regions near the poles.
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