Utah is about 1.2 times smaller than Wyoming.

Wyoming is approximately 251,489 sq km, while Utah is approximately 212,751 sq km, making Utah 84.6% the size of Wyoming. Meanwhile, the population of Wyoming is ~563,626 people (2.2 million more people live in Utah).
Tip: This to-scale comparison of Wyoming vs. Utah uses the Mercator projection, which distorts the size of regions near the poles.