I have booked a full size car to pick up tomorrow. The National site has Buick Regal or similar listed as a full size car. Aside from the Regal, do you know what might be considered full size?
Twice, I've booked full size with National and they've not had any available when we arrivied. They gave us SUVs instead. The lady told me that they were the same price. One year we got a GMC Jimmy. The next time we got a Trooper. It was really nice having the extra room.
You will also see Pontiac Grand Prix, Olds Intrigue, and Chevy Malibu as full size. I think the Malibu is more mid-size, even by car rental standards, but National disagrees.