Iowa is about 5,788 times bigger than Saint Barthelemy.

Saint Barthelemy is approximately 25 sq km, while Iowa is approximately 144,701 sq km, making Iowa 578,704% larger than Saint Barthelemy. Meanwhile, the population of Saint Barthelemy is ~7,103 people (3.0 million more people live in Iowa).
Tip: This to-scale comparison of Saint Barthelemy vs. Iowa uses the Mercator projection, which distorts the size of regions near the poles.