SVG Flags Icons from http://flag-icon-css.lip.is/!

Example

<link href="https://flags.cz/flags.css" rel="stylesheet" type="text/css">

<i class="flag-icon flag-icon-vn" title="VN"></i> <span>Vietnam</span>
<i class="flag-icon flag-icon-cz" title="CZ"></i> <span>Czech Republic</span>
<i class="flag-icon flag-icon-au" title="AU"></i> <span>Australia</span>
<i class="flag-icon flag-icon-br" title="BR"></i> <span>Brazil</span>