Just was there this past weekend and was very worried I would not be able to ride. I am tall for a female (5'11"), but I am also heavy around the waist down through my thighs. I wear a size 20 tall pants; however, my chest and arms are just average size.
I was told when I tried the first set of seats out front that they only have to get a green or yellow light. Only those with the red light cannot ride. I did get a yellow light and 2 clicks. I was told to ride in the outer seats as they are larger. I was not asked to try the seats inside the queue, they let me pass.
When I got on the ride, the seat was snug around my thighs, rear and stomach area, but I fit and got the yellow light. The person locking the harness, pushed hard on mine and said I got a green light. It was tight, but I could breathe and was able to ride (I would have rode even if I could not breathe!!). My chest area was fine as I carry my weight below my waist. I could see those with broad shoulders or large chest would have problems.
One thing I felt helped is that I wore very light capri pants (it was very warm) kind of like yoga pants material that was very stretchy. It let my weight mold into the seat and move around a bit. That sounds horrible, but had I been wearing jeans I do not know if i would have been able to fit as I would not have been able to move around to fill in all of the space as well.
I hope that helps someone as it is a great ride!! Since everyone is built differently it is really hard to know if you will fit or not. I would have been embarrassed if I was not able to ride, but we rode that first and there were not many people out front most were still down in the shops area. I was determined to try!!