Saint Vincent and the Grenadines is about 4.3 times bigger than Anguilla.

Anguilla is approximately 91 sq km, while Saint Vincent and the Grenadines is approximately 389 sq km, making Saint Vincent and the Grenadines 327% larger than Anguilla. Meanwhile, the population of Anguilla is ~18,741 people (82,228 more people live in Saint Vincent and the Grenadines).
Tip: This to-scale comparison of Anguilla vs. Saint Vincent and the Grenadines uses the Mercator projection, which distorts the size of regions near the poles.