How to resize meshes in URDF?

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I am currently drawing out my robot using URDF. I am at the end of the first URDF tutorial (see http://wiki.ros.org/urdf/Tutorials/Bu... ). My problem: once I added my mesh, it is very disproportionate to the rest of the drawing, and I have no idea how to resize the mesh. The tutorial states that: "Meshes can also be sized using relative scaling parameters or a bounding box size"

where do I find an example? Where is the documentation? and if no documentation or examples exist, could you please provide an example of code for a "bounding box" or "relative scaling"?

More detail:

image before meshes are added in urdf file:

image after meshes are added in urdf file:

the code importing the meshes:

   <!-- *********************(21) LMS LINK - MESHES****************************-->
  <!-- a "link" is the part that we are creating. All the internal tags describe
       this part. This is the body of Jimmy (both square levels) -->
  <link name="LMS_link">
    <visual>
      <geometry>
        <!--box dimensions is Meters. L X W X H where the L X H is a rectangle, 
            and the H extrudes it upwards -->
        <mesh filename="package://urdf_tutorial/meshes/LMS-200-30106.dae"/>
      </geometry>
      <origin rpy="0 0 0" xyz="0 0 0"/>
      <material name="white"/>
    </visual>
  </link>

    <!-- *********************(22) LMS to LMS PLATE JOINT **********************-->
    <!-- a joint allows us to create a relationship between two links (parts)-->
      <joint name="LMS_to_LMS_plate_joint" type="fixed">
        <parent link="LMS_plate_link"/>
        <child link="LMS_link"/>
        <!-- this is the point at which the two parts attach to one another-->
        <origin xyz="0 0 0"/>
      </joint>

I am building a URDF because it was suggested here: https://answers.ros.org/question/2718...