Isle of Man is about 1,185 times smaller than Texas.

Texas is approximately 678,052 sq km, while Isle of Man is approximately 572 sq km, making Isle of Man 0.08% the size of Texas. Meanwhile, the population of Texas is ~25.1 million people (25.1 million fewer people live in Isle of Man).
Tip: This to-scale comparison of Texas vs. Isle of Man uses the Mercator projection, which distorts the size of regions near the poles.