.fi {
  background-size: contain;
  background-position: 50%;
  background-repeat: no-repeat;
  position: relative;
  display: inline-block;
  width: 1.333333em;
  line-height: 1em;
}
.fi::before { content: "\00a0"; }
.fi.fis { width: 1em; }
.fi-gb { background-image: url('flags/gb.svg'); }
.fi-es { background-image: url('flags/es.svg'); }
.fi-br { background-image: url('flags/br.svg'); }
.fi-ru { background-image: url('flags/ru.svg'); }
.fi-bg { background-image: url('flags/bg.svg'); }