London is about 19 times smaller than Lesotho.

Lesotho is approximately 30,355 sq km, while London (including the 32 boroughs of greater London) is approximately 1,572 sq km, making London 5.18% the size of Lesotho.
Tip: This to-scale comparison of Lesotho vs. London uses the Mercator projection, which distorts the size of regions near the poles.
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