South Georgia and South Sandwich Islands is about 131 times smaller than Thailand.

Thailand is approximately 513,120 sq km, while South Georgia and South Sandwich Islands is approximately 3,903 sq km, making South Georgia and South Sandwich Islands 0.76% the size of Thailand.
Tip: This to-scale comparison of Thailand 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. Thailand