Pitcairn Islands is around the same size as Bouvet Island.

Bouvet Island is approximately 49 sq km, while Pitcairn Islands is approximately 47 sq km, making Pitcairn Islands 95.92% the size of Bouvet Island.
Tip: This to-scale comparison of Bouvet Island vs. Pitcairn Islands uses the Mercator projection, which distorts the size of regions near the poles.