I would not consider it a full-size car, however I'm sure Avis does. It's 2" longer than the Sonata; same head room as the Impala; same leg room as the Grand Prix, and more than the Montego. Avis considers those other 4 full size, so I wouldn't see why the Aura would not be. I have a real problem, though, with the Sonata/Grand Prix/Taurus being in the full-size category but that's another thread.