This is a complete almost 27' diameter (8 meter) 5V 3/8 dome using 1" PVC.
We'll fess up, here. The customer ordered a 25'11" dome and we built and shipped this one, which was a whole foot larger than what they needed. Our mistake. We made them a new one and they shipped this one back. It's been set up once, but otherwise it's totally new.
This configuration is 3/8 of a sphere, so just less than a hemisphere. There is over 500 sq. ft. of floor space, and it stands 10.5' high in the middle.