Saint Barthelemy is about 27,063 times smaller than Burma.

Burma is approximately 676,578 sq km, while Saint Barthelemy is approximately 25 sq km, making Saint Barthelemy 0.0% the size of Burma. Meanwhile, the population of Burma is ~57.5 million people (57.5 million fewer people live in Saint Barthelemy).
Tip: This to-scale comparison of Burma vs. Saint Barthelemy uses the Mercator projection, which distorts the size of regions near the poles.