Saint Lucia is about 1.2 times bigger than Lake Tahoe.

Lake Tahoe is approximately 502 km² (194 sq mi), while Saint Lucia is approximately 616 sq km, making Saint Lucia 23% larger than Lake Tahoe.
Tip: This to-scale comparison of Lake Tahoe vs. Saint Lucia uses the Mercator projection, which distorts the size of regions near the poles.
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