title: Box2d - Get width of fixture from a body or should I even try?
body: <p>I have read some threads about this but they did not really look clear to.
  Therefore.. How to find the width of one fixture? I know hot to get access to the fixture and all that but do not really know about the last part. Especially, I do not know how to do this the most efficient way and if you actually would be better off storing a float variable as userData for the body.</p>
  
  <p>Thanks, it is much appreciated!</p>