Pitcairn Islands is about 14,427 times smaller than Texas.

Texas is approximately 678,052 sq km, while Pitcairn Islands is approximately 47 sq km, making Pitcairn Islands 0.01% the size of Texas. Meanwhile, the population of Texas is ~25.1 million people (25.1 million fewer people live in Pitcairn Islands).
Tip: This to-scale comparison of Texas vs. Pitcairn Islands uses the Mercator projection, which distorts the size of regions near the poles.