Honolulu is about 2.5 times smaller than Saint Vincent and the Grenadines.

Saint Vincent and the Grenadines is approximately 389 sq km, while Honolulu is approximately 157 sq km, making Honolulu 40.28% the size of Saint Vincent and the Grenadines.
Tip: This to-scale comparison of Saint Vincent and the Grenadines vs. Honolulu uses the Mercator projection, which distorts the size of regions near the poles.