Luxembourg is around the same size as Rhode Island.

Rhode Island is approximately 2,706 sq km, while Luxembourg is approximately 2,586 sq km, making Luxembourg 95.57% the size of Rhode Island. Meanwhile, the population of Rhode Island is ~1.1 million people (402,203 fewer people live in Luxembourg).
Tip: This to-scale comparison of Rhode Island vs. Luxembourg uses the Mercator projection, which distorts the size of regions near the poles.