.currency-flag {
  background-repeat: no-repeat;
  background-position: center;
  background-size: cover;
  position: relative;
  display: inline-block;
  vertical-align: middle;
  width: 40px;
  height: 40px;
  overflow: hidden;
  box-shadow: 0 0 1px #0000004d inset;
  border-radius: 50%;
  background-clip: padding-box;
}