Democratic Republic of the Congo is about 10 times bigger than Laos.

Laos is approximately 236,800 sq km, while Democratic Republic of the Congo is approximately 2,344,858 sq km, making Democratic Republic of the Congo 890% larger than Laos. Meanwhile, the population of Laos is ~7.7 million people (100.7 million more people live in Democratic Republic of the Congo).
Tip: This to-scale comparison of Laos vs. Democratic Republic of the Congo uses the Mercator projection, which distorts the size of regions near the poles.