Someone was asking recently about the codes.
My "Dead Sea Scroll" on the matter has just surfaced.
CCMT XX YY ZZ
XX = side of diamond
YY = Height of diamond
ZZ = Radius of cutting tip. (Cutting depth must be at least this radius, or the tip will break or wear rapidly, YMMV)
So, for a Chronos CCMT120308,
Side = 12 mm
Height = 3 mm
Radius of tip = 0.8mm (Watch out for included decimal point!)