Jamaica is about 135 times smaller than Alaska.

Alaska is approximately 1,481,348 sq km, while Jamaica is approximately 10,991 sq km, making Jamaica 0.74% the size of Alaska. Meanwhile, the population of Alaska is ~710,231 people (2.1 million more people live in Jamaica).
Tip: This to-scale comparison of Alaska vs. Jamaica uses the Mercator projection, which distorts the size of regions near the poles.