Comoros is about 207 times smaller than Papua New Guinea.

Papua New Guinea is approximately 462,840 sq km, while Comoros is approximately 2,235 sq km, making Comoros 0.48% the size of Papua New Guinea. Meanwhile, the population of Papua New Guinea is ~10.8 million people (9.9 million fewer people live in Comoros).
Tip: This to-scale comparison of Papua New Guinea vs. Comoros uses the Mercator projection, which distorts the size of regions near the poles.
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