Earth is the largest terrestrial planet in our solar system <a href="http://geography.about.com/od/physicalgeography/a/geodesyearthsize.htm">http://geography.about.com/od/physicalgeography/a/geodesyearthsize.htm</a> and overall is a medium sized planet http://www.huffingtonpost.com/2013/01/07/milky-way-planets-17-billion-nasa-kepler-telescope_n_2426568.html