Alaska is about 2,060 times bigger than Singapore.

Singapore is approximately 719 sq km, while Alaska is approximately 1,481,348 sq km, making Alaska 205,872% larger than Singapore. Meanwhile, the population of Singapore is ~5.9 million people (5.2 million fewer people live in Alaska).
Tip: This to-scale comparison of Singapore vs. Alaska uses the Mercator projection, which distorts the size of regions near the poles.