Boogs

I noticed that most jumbo and oversize grips have an inside diameter of .600 across different manufacturers, but that they vary in terms of gram weight.   This leads me to believe that grip sizes  in terms of outside diameter  MAE vary from manufacturer to manufacturer. Is this the case, and   of so, how can I get an idea of jumbo grip size in terms of outside diameter for different brands?

Jim Yachinich answered ago