Jamaica is about 12 times bigger than Dallas.

Dallas is approximately 880 sq km, while Jamaica is approximately 10,991 sq km, making Jamaica 1,150% larger than Dallas.
Tip: This to-scale comparison of Dallas vs. Jamaica 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.