Oklahoma is about 15 times bigger than Falkland Islands (Islas Malvinas).

Falkland Islands (Islas Malvinas) is approximately 12,173 sq km, while Oklahoma is approximately 177,847 sq km, making Oklahoma 1,361% larger than Falkland Islands (Islas Malvinas). Meanwhile, the population of Falkland Islands (Islas Malvinas) is ~3,198 people (3.7 million more people live in Oklahoma).
Tip: This to-scale comparison of Falkland Islands (Islas Malvinas) vs. Oklahoma uses the Mercator projection, which distorts the size of regions near the poles.