Luxembourg is about 1.4 times bigger than Lake Okeechobee.

Lake Okeechobee is approximately 1,890 km² (730 sq mi), while Luxembourg is approximately 2,586 sq km, making Luxembourg 37% larger than Lake Okeechobee.
Tip: This to-scale comparison of Lake Okeechobee vs. Luxembourg uses the Mercator projection, which distorts the size of regions near the poles.
Our free app, MapSize by MyLifeElsewhere — compare any two places, to scale on your mobile device.