Seychelles is about 228 times bigger than Monaco.

Monaco is approximately 2 sq km, while Seychelles is approximately 455 sq km, making Seychelles 22,650% larger than Monaco. Meanwhile, the population of Monaco is ~31,400 people (65,617 more people live in Seychelles).
Tip: This to-scale comparison of Monaco vs. Seychelles uses the Mercator projection, which distorts the size of regions near the poles.