Kazakhstan is about 1.8 times bigger than Alaska.

Alaska is approximately 1,481,348 sq km, while Kazakhstan is approximately 2,724,900 sq km, making Kazakhstan 84% larger than Alaska. Meanwhile, the population of Alaska is ~710,231 people (18.7 million more people live in Kazakhstan).
Tip: This to-scale comparison of Alaska vs. Kazakhstan uses the Mercator projection, which distorts the size of regions near the poles.