Christmas Island is about 1,766 times smaller than Romania.

Romania is approximately 238,391 sq km, while Christmas Island is approximately 135 sq km, making Christmas Island 0.06% the size of Romania. Meanwhile, the population of Romania is ~18.5 million people (18.5 million fewer people live in Christmas Island).
Tip: This to-scale comparison of Romania vs. Christmas Island uses the Mercator projection, which distorts the size of regions near the poles.