Cheers they are the newer top 66 models, a bit like cdm's in shape but with grooves. I have measured then with digital calipers and they are definitely 26.4. Annoying as I bought them from planet x advertised as 25.4!
I was suprised too ! I thought as they are newer cinelli made have made a 25.4. But ither places online have them in 26.4 and 26.0 , think planet x have made a mistake .