If you have 8 1/2 x 11 paper that you need to fold into a standard size business envelope, here is a possible solution if this is an occasional job .  These are easy to use and they sit right on your desk.  This is a good choice for occasional folding jobs. If you need to fold large quantities of paper, lets say 1000 or more at a time, there are other solutions. Please call me at 515.771.4771 or email me at scochren@tripletts.com