Namibia is about 1.8 times bigger than Papua New Guinea.

Papua New Guinea is approximately 462,840 sq km, while Namibia is approximately 824,292 sq km, making Namibia 78% larger than Papua New Guinea. Meanwhile, the population of Papua New Guinea is ~10.8 million people (7.7 million fewer people live in Namibia).
Tip: This to-scale comparison of Papua New Guinea vs. Namibia uses the Mercator projection, which distorts the size of regions near the poles.
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