I'm 6'3" tall so I reserved a "full size" car. I got a Kia Optima, which Avis calls "full size" but car publications call "mid-size". (I've only had trucks for decades so I don't know cars.) My head hit the roof, and my eyes were higher than the rear-view mirror so I couldn't see out the entire right half of the windshield. I had to recline the seat back so I could see. Then I had to move the seat forward until my knees hit the dashboard. Not very comfortable but it worked. Beware of what the rental companies advertise as (and charge for) "full size" cars.