Circle with border in gainsboro and transparent area. For Maps in case of dark background.
<a href="//commons.wikimedia.org/wiki/User:Antonsusi" title="User:Antonsusi">Antonsusi</a> (<a href="//commons.wikimedia.org/wiki/User_talk:Antonsusi" title="User talk:Antonsusi"><span class="signature-talk">talk</span></a>)
<span class="int-own-work" lang="en">Own work</span>