Oklahoma is about 1.8 times smaller than Cote d'Ivoire.

Cote d'Ivoire is approximately 322,463 sq km, while Oklahoma is approximately 177,847 sq km, making Oklahoma 55.15% the size of Cote d'Ivoire. Meanwhile, the population of Cote d'Ivoire is ~28.7 million people (25.0 million fewer people live in Oklahoma).
Tip: This to-scale comparison of Cote d'Ivoire vs. Oklahoma uses the Mercator projection, which distorts the size of regions near the poles.