Riga is about 2.2 times smaller than Jakarta.

Jakarta is approximately 662 sq km, while Riga is approximately 304 sq km, making Riga 45.92% the size of Jakarta.
Tip: This to-scale comparison of Jakarta 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.