title: Getting width of 2d object in unity 3d
body: <p>I'm using the new 2d tools in Unity3d, and I have a game object with a 2d polygonal collider attached to it. I just want to understand how to get the width of this object! Why is this so difficult? The collider nor the game object have anything that has a "bounds" or "size" property. 
  Even if they did, however, how would I extrapolate width from a vector3 object? From what I understand about vector3 objects, they give a length (magnitude) from the origin of the scene. So how could I use distance from the scene's origin to determine with width of my game object? Any help would be greatly appreciated.</p>