Marshall Islands is about 2,792 times smaller than Spain.

Spain is approximately 505,370 sq km, while Marshall Islands is approximately 181 sq km, making Marshall Islands 0.04% the size of Spain. Meanwhile, the population of Spain is ~49.4 million people (49.3 million fewer people live in Marshall Islands).
Tip: This to-scale comparison of Spain vs. Marshall Islands uses the Mercator projection, which distorts the size of regions near the poles.
Our free app, MapSize by MyLifeElsewhere — compare any two places, to scale on your mobile device.