South Georgia and South Sandwich Islands is about 8 times smaller than Lesotho.

Lesotho is approximately 30,355 sq km, while South Georgia and South Sandwich Islands is approximately 3,903 sq km, making South Georgia and South Sandwich Islands 12.86% the size of Lesotho.
Tip: This to-scale comparison of Lesotho vs. South Georgia and South Sandwich Islands uses the Mercator projection, which distorts the size of regions near the poles.
Compare further: South Georgia and South Sandwich Islands vs. Lesotho