Finished pouch is about 5 inches square with an interior pocket 3.25 inches long. The large pocket is sized to fit a standard passport, while the inside pocket fits an ID card.

Exterior pouch is worked flat, with stitches bound off to make a spot for the interior pocket, which is picked up and knit in the round before seaming the sides of the outside pocket.

Also requires a button for closure.

This pattern was on About.com (which no longer exists) and has been deleted from their site, but for now it can still be found on the Internet Archive. They redirect and delete pages a lot so you may want to download/print to save.