Christmas Island is about 763 times smaller than Iceland.

Iceland is approximately 103,000 sq km, while Christmas Island is approximately 135 sq km, making Christmas Island 0.13% the size of Iceland. Meanwhile, the population of Iceland is ~392,404 people (390,712 fewer people live in Christmas Island).
Tip: This to-scale comparison of Iceland vs. Christmas Island uses the Mercator projection, which distorts the size of regions near the poles.
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