South Georgia and South Sandwich Islands is about 33 times smaller than Nicaragua.

Nicaragua is approximately 130,370 sq km, while South Georgia and South Sandwich Islands is approximately 3,903 sq km, making South Georgia and South Sandwich Islands 2.99% the size of Nicaragua.
Tip: This to-scale comparison of Nicaragua 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. Nicaragua