How to get the radius of a shpere trigger(collider)

One of the game objects has two sphere colliders (both of them are triggers) but with diffrent radius. How to get the radius of the bigger one when OnTriggerEnger the bigger one and how to get the radius of the smaller one when OnTriggerEnger the small one? plz


Good day.

Why? Why you have 2 identical colliders with different radius?.. The inner collider is doing nothing.

You only need 1 colider, and once you detect some trigger enter/stay you can calculate the distance of the object with vector3.distance

But having 2 identical collider have no sense.