Jersey is about 2,055 times smaller than Romania.

Romania is approximately 238,391 sq km, while Jersey is approximately 116 sq km, making Jersey 0.05% the size of Romania. Meanwhile, the population of Romania is ~18.5 million people (18.4 million fewer people live in Jersey).
Tip: This to-scale comparison of Romania vs. Jersey uses the Mercator projection, which distorts the size of regions near the poles.