||Rolodex card-->Business Card
My coworker gave me 300 hundred Rolodex cards that he'd ordered at the wrong size. I figured that Rolodex cards are meant as card holders (or were, back in the day) where you stapled or glued or taped a 3 by 2 inch card onto this sheet, and put it into your Rolodex. I figured I'd remove the need to stick/ tape stuff together.
And better yet, if you don't use a Rolodex, just tear along the perforations (I laser etched them in) and voila- normal, 3"x2" business card.