Changing The Width Of Each Section

Here is an image of my forums with arrow pointed to what ima ask.
So my question is, can you set the width of each section where the arrows point to your liking?

Try inserting width for the tables to fit your wishes.
1. This is for the first tabe (Forum table)

Code:

.pun table.table th.tcl {
    padding-left: 0.5em;
    width: 500px;
}

2. This is for 'topics and posts tables'

Code:

.pun .table .tc2, .pun .table .tc3 {
    text-align: center;
    width: 20%;
}

3. This is for Latest post table

Code:

.pun table th.tc2, .pun table th.tc3, .pun table th.tc4, .pun table th.tcl, .pun table th.tcr {
    overflow: hidden;
    width: 200px;
}

Assuming you're asking for punBB.

Thanks allot. This was exactly the answer I was looking for.