United Kingdom is approximately 243,610 sq km, while Papua New Guinea is approximately 462,840 sq km, making Papua New Guinea 90% larger than United Kingdom. Meanwhile, the population of United Kingdom is ~65.8 million people (58.5 million fewer people live in Papua New Guinea).
This to-scale map shows a size comparison of United Kingdom compared to Papua New Guinea. For more details, see an in-depth quality of life comparison of Papua New Guinea vs. United Kingdom using our country comparison tool.