Saint Vincent and the Grenadines is about 620 times smaller than Uganda.

Uganda is approximately 241,038 sq km, while Saint Vincent and the Grenadines is approximately 389 sq km, making Saint Vincent and the Grenadines 0.16% the size of Uganda. Meanwhile, the population of Uganda is ~46.2 million people (46.1 million fewer people live in Saint Vincent and the Grenadines).
Tip: This to-scale comparison of Uganda vs. Saint Vincent and the Grenadines uses the Mercator projection, which distorts the size of regions near the poles.