Kiribati is about 388 times smaller than New Mexico.

New Mexico is approximately 314,310 sq km, while Kiribati is approximately 811 sq km, making Kiribati 0.26% the size of New Mexico. Meanwhile, the population of New Mexico is ~2.1 million people (1.9 million fewer people live in Kiribati).
Tip: This to-scale comparison of New Mexico vs. Kiribati uses the Mercator projection, which distorts the size of regions near the poles.