Seattle is about 1.5 times smaller than Surrey.

Surrey is approximately 316 sq km, while Seattle is approximately 217 sq km, making Seattle 68.68% the size of Surrey.
Tip: This to-scale comparison of Surrey vs. Seattle 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.