For the different sizes and dimensions, try the carada.com web site. You can review the different width options, and within each category, you can get an actual height versus width measurement.
They make good screens for the money. I've got a 112 inch, 2.35 to 1 and was very happy with the total experience and results.
My only "concern" is maybe I went too large. Don't get caught up with trying to get the biggest screen possible. I have the Z3, in a total light controled room, which is about 15 feet wide, 24 feet long. The screen and projector work fine together. My issue is just the overall movie experience. Kind of like sitting in the first few rows of a movie theater.
Now that i've lived with this combo for a few weeks, I beleive i would have been more happy with a slightly smaller screen.
I also taped out the size before I bought, and thought I had the perfect size. But once actual moives are playing, especially fast paced scenes, it's a bit much. (although I still love my home theater) Don't know if that helps you or not. I'm probably the first person to tell you to consider smaller.