Dallas is about 2.3 times bigger than Saint Vincent and the Grenadines.

Saint Vincent and the Grenadines is approximately 389 sq km, while Dallas is approximately 880 sq km, making Dallas 126% larger than Saint Vincent and the Grenadines.
Tip: This to-scale comparison of Saint Vincent and the Grenadines vs. Dallas uses the Mercator projection, which distorts the size of regions near the poles.