Saudi Arabia is about 1.4 times bigger than Alaska.

Alaska is approximately 1,481,348 sq km, while Saudi Arabia is approximately 2,149,690 sq km, making Saudi Arabia 45% larger than Alaska. Meanwhile, the population of Alaska is ~710,231 people (34.6 million more people live in Saudi Arabia).
Tip: This to-scale comparison of Alaska vs. Saudi Arabia uses the Mercator projection, which distorts the size of regions near the poles.