United Kingdom is approximately 243,610 sq km, while Comoros is approximately 2,235 sq km, making Comoros 0.92% the size of United Kingdom. Meanwhile, the population of United Kingdom is ~65.8 million people (64.9 million fewer people live in Comoros).
This to-scale map shows a size comparison of United Kingdom compared to Comoros. For more details, see an in-depth quality of life comparison of Comoros vs. United Kingdom using our country comparison tool.