Riga is about 1.6 times smaller than Prague.

Prague is approximately 496 sq km, while Riga is approximately 304 sq km, making Riga 61.26% the size of Prague.
Tip: This to-scale comparison of Prague vs. Riga 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.