Democratic Republic of the Congo is about 3.5 times bigger than Texas.

Texas is approximately 678,052 sq km, while Democratic Republic of the Congo is approximately 2,344,858 sq km, making Democratic Republic of the Congo 246% larger than Texas. Meanwhile, the population of Texas is ~25.1 million people (83.3 million more people live in Democratic Republic of the Congo).
Tip: This to-scale comparison of Texas vs. Democratic Republic of the Congo uses the Mercator projection, which distorts the size of regions near the poles.