.fi {
  display: inline-block;
  background-size: contain;
  background-position: 50%;
  background-repeat: no-repeat;
}

.fi.fis {
  width:20px;
  line-height:20px;
}

.fi.fis::before {
  content: "\00a0";
}

.fi-ch {
  background-image: url(flags/1x1/ch.svg);
}

.fi-de {
  background-image: url(flags/1x1/de.svg);
}

.fi-at {
  background-image: url(flags/1x1/at.svg);
}