Can someone please measure up a standard grey motor valve spring for me? I forgot to do so before going on the road for work

, and need the dimension to check some bits for the Norman.
The dimension I need is the diameter of the spring. Needs to be fairly accurate please as I will be reusing them as supercharger relief valve springs.
Cheers,
Harv
327 Chev EK wagon, original EK ute for Number 1 Daughter, an FB sedan meth monster project and a BB/MD grey motored FED.