South Georgia and South Sandwich Islands is about 16 times smaller than Svalbard.

Svalbard is approximately 62,045 sq km, while South Georgia and South Sandwich Islands is approximately 3,903 sq km, making South Georgia and South Sandwich Islands 6.29% the size of Svalbard.
Tip: This to-scale comparison of Svalbard 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. Svalbard