Dallas is about 63 times bigger than Cocos (Keeling) Islands.

Cocos (Keeling) Islands is approximately 14 sq km, while Dallas is approximately 880 sq km, making Dallas 6,183% larger than Cocos (Keeling) Islands.
Tip: This to-scale comparison of Cocos (Keeling) Islands vs. Dallas uses the Mercator projection, which distorts the size of regions near the poles.