A compact mesh report for a volume mesh will consist of statistics split up into the following sections:
For each region, the following sub-sections will exist:
The overall section will also consist of the above items also for all regions, minus the mesh extents summary. An example compact output for a single region is shown below:

For a compact report, the entity count will include a summary of the number of cells, faces and vertices for the region. A more extensive breakdown of the different cell shapes used is provided in the full report.
The mesh extents are always reported in meters based on the global cartesian system. STAR-CCM+ computes all physical quantities in SI and therefore assumes the model is dimensioned correctly in meters. If a mesh was created using some other unit and was not properly scaled before import, it will result in incorrect physics being simulated. The mesh extents are originally reported at the end of the import report in the Output window for the simulation. You should always verify the coordinate extents for each region to make sure they correspond with the expected dimensional range. If the extents are incorrect, you can:
Once you have performed the scaling, its worth running the mesh diagnostics report and checking the mesh extents once more.