Ireland is about 3.5 times smaller than United Kingdom.

United Kingdom is approximately 243,610 sq km, while Ireland is approximately 70,273 sq km, making Ireland 28.85% the size of United Kingdom. Meanwhile, the population of United Kingdom is ~67.8 million people (62.5 million fewer people live in Ireland).
This to-scale comparison of United Kingdom vs. Ireland uses the Mercator projection, which distorts the size of regions near the poles. Learn more.

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