.woocommerce table.form-table .select2-container {
    min-width: 20px !important;
}
td.days_in_transit,
td.markup1,
td.markup2,
td.days_in_transit input,
td.markup1 input,
td.markup2 input, 
th.days_in_transit,
th.markup1,
th.markup2 {
    width: 120px !important;
    max-width: 120px;
    min-width: 120px;
    white-space: nowrap;
}