size matters:
Straight across the dish, all the white solid Birdviews, measure 8½ feet.
That is the only white/solid dish we have documentation for.
Brochure scans were posted last year... I think by Stogie... but I have saved my own copies to use for reference.
The company called that a 9 foot solid. We still call it like we measure it: 8½ ! -
Then, the brochure goes on to describe what they call 8', 9', and 10' perforated dishes.
Linuxman's black perf, is almost exactly the same 8½, if I remember.
So, the company probably called that 9 foot, too. We call it like we measure it!
If any of the "10 foot" perforated dishes are out there, they likely measure around 9½ feet straight across rim-to-rim.
second look:
Your dish appears to be installed upside down on the mount, relative to all other BV dishes I have pictures for.
That makes absolutely no difference.
My secondary dish is another brand, but looks a little like a perf BV.
It's an honest 8 feet and maybe an inch.
In my sig is a link, and I call it just 8 feet.