Boulder is about 1.8 times bigger than Sarasota.

Sarasota (map shows its 40 named neighbourhoods; the area covers the whole city) is approximately 38 sq km, while Boulder is approximately 70 sq km, making Boulder 83% larger than Sarasota.
Tip: This to-scale comparison of Sarasota vs. Boulder 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.