That's 7.5 in, which according to 'the book' by Mr Encill would appear to be a bit to small or too large, depending on how you look at it :huh:
Wow, those are very interesting Robbo
and, IMHO, definitely Green Leaves. I also have a photo in 'da book' of a tumbler (courtesy Graham Cooley) with a different design, although I still can't be 100% sure if this is Green Leaves.
The nearest sized bowl I have noted is 8 in, but this could vary depending on the size of the blank used, and sizes would undoubtably alter over the years when new moulds were made to replace older ones. Good point though. What is the height, Robbo?
Whatever... they definitely need to be donated to a museum (mine)