.fi {
  display: inline-block;
  width: 40px;
  height: 30px;
  background-size: contain;
  background-repeat: no-repeat;
  background-position: 50%;
  border-radius: 2px;
  vertical-align: middle;
  line-height: 1;
}

.fi-rw { background-image: url("/assets/flags/rw.svg"); }
.fi-ke { background-image: url("/assets/flags/ke.svg"); }
.fi-ug { background-image: url("/assets/flags/ug.svg"); }
.fi-tz { background-image: url("/assets/flags/tz.svg"); }
.fi-bi { background-image: url("/assets/flags/bi.svg"); }
.fi-cd { background-image: url("/assets/flags/cd.svg"); }