Antigua and Barbuda is about 9 times bigger than Bouvet Island.

Bouvet Island is approximately 49 sq km, while Antigua and Barbuda is approximately 443 sq km, making Antigua and Barbuda 803% larger than Bouvet Island.
Tip: This to-scale comparison of Bouvet Island vs. Antigua and Barbuda uses the Mercator projection, which distorts the size of regions near the poles.