Object's size in game units

I've been eyeballing objects against a 1x1x1 cube, but needed to get the size of an object in game units. is this the best way to do this, accounting for rotations. It seems to be working:

Code (csharp):

1.  
2. using UnityEngine;
3. using UnityEditor;
4. using System.Collections;
5.  
6. public class GetSize : ScriptableObject {
7.     private static Quaternion rotation;
8.     private static Vector3 size;
9.     private static GameObject go;
10.     [MenuItem ("GameObject/Get Renderer Size")]
11.     static void MenuGetSize(){
12.         rotation = Selection.activeTransform.localRotation;
13.         Selection.activeTransform.localRotation = Quaternion.identity;
14.         if (Selection.activeTransform.gameObject.renderer != null){
15.             size = Selection.activeTransform.gameObject.renderer.bounds.size;
16.             Selection.activeTransform.localRotation = rotation;
17.             EditorUtility.DisplayDialog("Object Scale", "X: "+size.x+", Y: "+size.y+", Z: "+size.z, "OK", "");
18.         } else {
19.             EditorUtility.DisplayDialog("Oops", "There is no renderer available on this object.", "OK", "");   
20.         }
21.     }
22. }
23.  
24.