Change size of LEFT SIDE column

Sorry if this has been answered before but I could not find it. I need to change the padding and the overall size of the left side column. Which file do I modify and which lines of code?

Thanks
Alkis

Width of right and left column can be set from template parameters. For padding see :

.column_left_pad {
padding: 30px 15px;
border: 1px solid #ddd;
margin: 0 35px 0 0;
line-height: 20px;
font-size: 11px;
}

that is in layout.css

great stuff!!! THANK YOU!