Boston is about 395 times smaller than Slovakia.

Slovakia is approximately 49,035 sq km, while Boston is approximately 124 sq km, making Boston 0.25% the size of Slovakia.
Tip: This to-scale comparison of Slovakia vs. Boston 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.