Specs for Size & internals Cushions Ball Chair  

I've been reading the specs. replies on the womb chair with interest and am asking a similar question for Aarnio's Ball chair.
I have the material for the cushions after looking for a great deal of time but I need confirmation of the sizes of both cushions and what the internals were of a circa 1967 asko Ball Chair
My measurements to date have been 650mm x 600mm x 90mm. Can anyone confirm this or correct it?
And I have no idea of what they were 'stuffed' with. Anyone know?