rilwis/meta-box

.rwmb-select {
    min-width: 160px;
}
.rwmb-select.rwmb-select[multiple] {
    padding: 0;
}
.rwmb-select option {
    padding: 4px 8px;
}
.rwmb-select-all-none {
    display: block;
    margin-top: 5px;
}