Tennessee is about 259 times bigger than Heard Island and McDonald Islands.

Heard Island and McDonald Islands is approximately 412 sq km, while Tennessee is approximately 106,752 sq km, making Tennessee 25,811% larger than Heard Island and McDonald Islands.
Tip: This to-scale comparison of Heard Island and McDonald Islands vs. Tennessee uses the Mercator projection, which distorts the size of regions near the poles.

Compare further: Tennessee vs. Heard Island and McDonald Islands

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