2x5 (14") with loft, total ~18sq ft (~1.67sq m) with 2 cavies (planning to get a 3rd soon).

Below cage has another 2 sections, to raise it high off the ground, and is right next to my work desk so they can be used to me being around. Had to do closed top due to cats (one of which is VERY interested in them). All tops flip open for easy cleaning / feeding / etc

Took a few hours to put together, but I'm very satisfied with it!