have done before with 12" x 12" paper, but this time I wanted to see how it worked with A4 cardstock.
The result is shown here and whilst it is not as versatile as the larger version, I think it would suffice for smaller cards provided they aren't too dimensional as there is simply not the room inside for anything too bulky.The papers are from a 6" x 6" K & Co. Designer pad and the closure is a simple length of organza ribbon wrapped around a brad.