.fib { background-size: contain; background-position: 50%; background-repeat: no-repeat; } .fi { .fib; position: relative; display: inline-block; width: unit((4 / 3), em); line-height: 1em; &:before { content: "\00a0"; } &.fis { width: 1em; } } .flag-icon(@country) { .fi-@{country} { background-image: ~"url(@{flag-icons-path}@{flag-icons-rect-path}/@{country}.svg)"; &.fis { background-image: ~"url(@{flag-icons-path}@{flag-icons-square-path}/@{country}.svg)"; } } }