Djibouti is around the same size as New Hampshire.

New Hampshire is approximately 23,227 sq km, while Djibouti is approximately 23,200 sq km, making Djibouti 99.88% the size of New Hampshire. Meanwhile, the population of New Hampshire is ~1.3 million people (359,197 fewer people live in Djibouti).
Tip: This to-scale comparison of New Hampshire vs. Djibouti uses the Mercator projection, which distorts the size of regions near the poles.