span.select2-dropdown {
    min-width: 50vw;
}
input.select2-search__field {
    padding-right: 20px !important;
    background-image: url(chosen-sprite@2x.png)!important;
    background-size: 52px 37px!important;
    background-repeat: no-repeat!important;
    background-position: right 0px bottom 6px;
}