By default, wpDataTables doesn’t allow you to combine the “Scrollable” option with custom column widths — because custom widths require enabling “Limit Table Width”, which automatically disables horizontal scroll, as explained in our Documentation.
There’s a workaround that allows you to:
Enable horizontal scrolling
Define custom widths for one or more columns
Enable “Scrollable” in the Display tab of your table settings.
Add the following custom CSS to the table’s Customize → Custom CSS section:
.wpDataTablesWrapper table.scroll.wpDataTableID-1 {
width: max-content !important;
table-layout: fixed !important;
}
.wpDataTableID-1 th.column-yourcolumn {
width: 300px !important;
}Replace wpDataTableID-1 with your actual table ID
Replace yourcolumn with the original header name of the column (see below)
Let’s say your table ID is 2671 and you want to set a fixed width for the firstname column.
Your CSS would look like this:
.wpDataTablesWrapper table.scroll.wpDataTableID-1 {
width: max-content !important;
table-layout: fixed !important;
}
.wpDataTableID-1 th.column-yourcolumn {
width: 300px !important;
} 
