Been in a couple friends Miata's. My size wasn't a problem, however, my height was. I have long legs and the last time I tried to drive one, I had shorts on and couldn't hardly turn the steering wheel without removing skin. Couldn't fit worth a shit in my buddy's 94 mustang, either. Never drove it, but my knees were in the dashboard with the seat back on the passenger side. Now, my buddies mr2 spyder, which looks as small if not more so than a miata, I fit great as driver or passenger.