Guam is about 7 times bigger than The Hague (Den Haag).

The Hague (Den Haag) (excluding the city's 15.68 sq km of water area) is approximately 82 sq km, while Guam is approximately 544 sq km, making Guam 560% larger than The Hague (Den Haag).
Tip: This to-scale comparison of The Hague (Den Haag) vs. Guam uses the Mercator projection, which distorts the size of regions near the poles.