Staten Island is about 12 times smaller than Riyadh.

Riyadh (map shows its 9 named neighbourhoods; the area covers the whole city) is approximately 1,798 sq km, while Staten Island is approximately 149 sq km, making Staten Island 8.29% the size of Riyadh.
Tip: This to-scale comparison of Riyadh vs. Staten Island uses the Mercator projection, which distorts the size of regions near the poles.
Our free app, MapSize by MyLifeElsewhere — compare any two places, to scale on your mobile device.