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

South Georgia and South Sandwich Islands is approximately 3,903 sq km, while Lesotho is approximately 30,355 sq km, making Lesotho 678% larger than South Georgia and South Sandwich Islands.
Tip: This to-scale comparison of South Georgia and South Sandwich Islands vs. Lesotho uses the Mercator projection, which distorts the size of regions near the poles.
Compare further: Lesotho vs. South Georgia and South Sandwich Islands