The Earth and the moon with their size at the exact same scale.
<a href="//commons.wikimedia.org/wiki/User:Lsmpascal" title="User:Lsmpascal">Lsmpascal</a>
CC BY-SA 3.0
Own work, the Earth's texture was taken from <a rel="nofollow" class="external text" href="http://visibleearth.nasa.gov/view_cat.php?categoryID=1484">the NASA's site</a> used under a free licence <a rel="nofollow" class="external text" href="http://visibleearth.nasa.gov/useterms.php">under these terms</a> and NASA requires that they be provided a credit as the owners of the imagery  and the Moon's texture is from <a href="//commons.wikimedia.org/wiki/File:Moonmap_from_clementine_data.png" title="File:Moonmap from clementine data.png">this Commons' image released in th public domain</a>.