Since I've been asked for instructions here they are:
The instructions I originally used were to take a 12x12 piece of paper, make two markings 2.5" from the corners on across from each other. Cut along this diagonal to create the bases for two separate cards. This is how I started but then realized it would be too long for a business size envelope so I decided to shorten it so it will fit. Obviously it's what you prefer. Then you score it at 4" and 8".