Cathy and David - thanks for taking the time to reply, and yes, you are both apparently correct - I shud have picked up on the Stewarts' page showing varieties of three piece flower bowl sets. Obviously, rushing again! - I saw only the page showing the list of Jade pattern Nos. and quantities made. So - 608 sets (excluding seconds) manufactured - makes you wonder how many are left now - and in the intervening years how many have been dropped, lost or simply 'binned' as old fashioned! Like you, I was intrigued at the extent of the translucentness(?) of this piece - I have several other pieces of Davidson Jade, but none that are quite this 'thin' in colour, but I think we can definitely say it is Davidson. Since I don't know what method was used to manufacture these bowls (there are no mould seams), difficult to say why there shud be this variation in size - but certainly mine is almost at the 11" mark. I wud dearly love to have the dome and plinth to make up the complete set, so must keep looking for them. Personally, I like Jade, and oddly this translucent effect is quite appealing. thanks again for your help. Paul S.