How do you determine the core size of a golf club’s shaft?

QUESTION:
I have searched the internet and every methot to do this requires that you take the old grip off of your club and measure. Since i will be purchasing a set of grips and installation kit online from amazon, I don’t want a period of 2weeks without grips on my clubs. I dont want a professional to replace them for me for obvious price reasons. Lastly and most unfortunately the golf club maker of my set doesn’t reveal this information on their website and the only contact with them is by mail [slow]. Thanks for any advice.

I use Tommy Armour Morph Irons(rifle 5.0 shaft R flex),
Adams Golf 460D (Nv regular flex),
Adams Golf ovation 4 wood (stiff flex)

these are the clubs that i wanted to re-grip.
Thanks for any advice.
P.S. lets say for instance that my golf clubs have a .620 core size and i buy the .600 then im out 80 bucks. this is why i want to know.

ANSWER:

Answer by what the hell
why don’t you email the shaft makers?