Oman is about 1.5 times smaller than Papua New Guinea.

Papua New Guinea is approximately 462,840 sq km, while Oman is approximately 309,500 sq km, making Oman 66.87% the size of Papua New Guinea. Meanwhile, the population of Papua New Guinea is ~9.6 million people (5.8 million fewer people live in Oman).
This to-scale comparison of Papua New Guinea vs. Oman uses the Mercator projection, which distorts the size of regions near the poles. Learn more.

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