Singapore is about 350 times smaller than Wyoming.

Wyoming is approximately 251,489 sq km, while Singapore is approximately 719 sq km, making Singapore 0.29% the size of Wyoming. Meanwhile, the population of Wyoming is ~563,626 people (5.4 million more people live in Singapore).
Tip: This to-scale comparison of Wyoming vs. Singapore uses the Mercator projection, which distorts the size of regions near the poles.