title: How to work with units (meters) in unity
body: <p>I don't really know how to work with units in unity.</p>
  
  <p>Google told me, that unity's default is: 1 unit = 1 meter.</p>
  
  <p>The problem is: When I create a cube I cannot tell what its size should be.
  It is created with the following scale: (1, 1, 1)
  But I do not have any information what its dimension in meters are.</p>
  
  <p>When I create a Plane it also show me a scale of (1, 1, 1) but is nearly 10 times the size of a cube.</p>
  
  <p>So how is it possible to do stuff like: Create cube with height 2 meters, create a plane with dimension 5*5 meters, when I am not able to set the actual size?</p>