We have a standard 31 foot which is a tall version of the 30: https://shelter-systems.com/large.html
We can make a 31 bubble as a special order which adds another approximately 5 feet in height. We can also make a Double Bubble 31which adds yet another 5 feet in height. Note that the taller we go with these domes more subject to wind they are. Any dome larger than the standard 31 must be shipped by truck.