The domes are scalable. We have some standard sizes listed with every configuration, but within reason, you can make the domes any diameter you want. The height and floor area will be dependent on the diameter.   Disclaimer: When you use Sonostar hubs, you're the engineer.  If you try to build a ridiculously large dome in a 2V configuration, you're basically conducting a physics experiment that has a high probability of failure.  We're happy to give advice, but we're not engineers either.   We've just built a lot of domes and we know what works.