Edinburgh is about 1.2 times bigger than Seattle.

Seattle is approximately 217 sq km, while Edinburgh (map shows its 30 named neighbourhoods; the area covers the whole city) is approximately 259 sq km, making Edinburgh 19% larger than Seattle.
Tip: This to-scale comparison of Seattle vs. Edinburgh 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.