British Indian Ocean Territory is about 602 times smaller than Guinea-Bissau.

Guinea-Bissau is approximately 36,125 sq km, while British Indian Ocean Territory is approximately 60 sq km, making British Indian Ocean Territory 0.17% the size of Guinea-Bissau.
Tip: This to-scale comparison of Guinea-Bissau vs. British Indian Ocean Territory uses the Mercator projection, which distorts the size of regions near the poles.

Compare further: British Indian Ocean Territory vs. Guinea-Bissau

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