Example stackoverflow

HTML

<div class="round">
        </div>

CSS

div.round {
                height: 32px;
                width: 32px;
                background-color: #ffffff;
                background-image: url(https://cdn.rawgit.com/xintrea/mytetra_syncro/master/icons/Gnome/color_gnome_2_chardevice.svg) ;
                background-position: center ;
                background-repeat: no-repeat;
                background-size: 24px;
                border-radius: 20px;
            }
            body {
                background-color: #a3a3a3;
            }