Providence is about 2.1 times smaller than Lisbon.

Lisbon (map shows its 24 named neighbourhoods; the area covers the whole city) is approximately 100 sq km, while Providence is approximately 48 sq km, making Providence 47.65% the size of Lisbon.
Tip: This to-scale comparison of Lisbon vs. Providence 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.