.select2-selection__rendered{
    line-height:24px;
}

@media only screen and (max-width:450px){
    .select2-selection{
        height:42px !important;
    }
    .select2-selection__rendered{
        line-height:42px !important;
    }
    .select2-container--default .select2-selection--single .select2-selection__arrow{
        height:42px !important;
    }
}