Idaho is about 3.7 times smaller than Turkey.

Turkey is approximately 783,562 sq km, while Idaho is approximately 214,314 sq km, making Idaho 27.35% the size of Turkey. Meanwhile, the population of Turkey is ~83.0 million people (81.5 million fewer people live in Idaho).
Tip: This to-scale comparison of Turkey vs. Idaho uses the Mercator projection, which distorts the size of regions near the poles.