Really easy tutorial here, I'll be teaching you how to always launch Toribash in your preferred size.

First, browse to your Toribash folder and right click on the Toribash Widescreen shortcut.
Select properties.
In the text box "target" scroll to the end of the URL.
Change -width and -hight to your preferences.
Mine looks like this: "CProgram Files\Toribash\toribash.exe" -width 900 -height 650
Now every time you open this file, it launches toribash to that size.