Falkland Islands (Islas Malvinas) is about 27,666 times bigger than Holy See (Vatican City).

Holy See (Vatican City) is approximately 0 sq km, while Falkland Islands (Islas Malvinas) is approximately 12,173 sq km, making Falkland Islands (Islas Malvinas) 2,766,491% larger than Holy See (Vatican City). Meanwhile, the population of Holy See (Vatican City) is ~1,000 people (2,198 more people live in Falkland Islands (Islas Malvinas)).
Tip: This to-scale comparison of Holy See (Vatican City) vs. Falkland Islands (Islas Malvinas) uses the Mercator projection, which distorts the size of regions near the poles.
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