How do I print a custom size business card?
Quick Biz Cards is designed for printing on compatible professional business card templates, as a result, all the cards will be printed to 10 business card per sheet dimensions. To print customize size, please export the design as an image, then you will be able to print it outside of the app just like a regular photo, this will be easier for you to customize the photo size.

For instructions on exporting the design to a photo, please see http://youtu.be/uPnpB5K3C6A