Vector3 as Constant in Script

I want to define Vector3 as per following manner.

public static class Constants
{
   public readonly Vector3 INITIAL_OBJECT_SCALE = Vector3.one;
}

[22681-static+instance.png|22681]

I want to access my constant Vector3 variable as

Constant.OBJECT_INITIAL_SCALE

So what is the way to achieve this?

public static readonly INITIAL_OBJECT_SCALE = Vector3.one;

You still have to make static class members static