Excel spreadsheet columns should be expanded to the correct width of the contents present in the each cells

I'm using "Copy document" and "Export  Data Store entity to Excel" smart services in a process model to generate a excel sheet. While the sheet is generated when the contents are displayed, the cells don't fit to the width of the contents within them. In excel we can generally expand according to the width of the contents by selecting all rows and columns and double clicking in the middle of any two columns. But that is after generating the file. So, I want this columns to be auto adjusted or expanded while generating itself. how do I make this happen?

Now,

How I need it to be,

Thanks,

Shravan