I measured them up before I searched the net and they are as close as we are going to find

SPECS: Length: 28mm (1.1")
Inner Diameter: 11mm (0.43")
Outer Diameter: 13mm (0.51")

by my measurements the inner diameter is just slightly larger so they will fit over the shock body with no problem and the outer diameter will still sit on the retaining collar.

as michael said, we got all 8 springs from hard to soft - there should be something in there to suit every track...hopefully.