Here we go!
What you'll need:
For the interior pockets:
closure-flap 1x 16.5x8cm
Heavy and medium/light fusible interfacing
if you prefer inches you can round your numbers so you won't get
too odd sizes to work with.
My Dutch passport fits ( it's 9x12.5cm), if you are from another nationality you should measure beforehand (or put it in a different pocket inside the wallet :)
Read the whole tutorial before sewing!
Iron the heavy interfacing on both base parts and the flap(the black and white in my case) and the medium/light onto the rest.
Put the base parts aside.
Take one of the 23x 18.5 pocket pieces and iron it in half. With a (quilter's) ruler cut of a 45 angle on the FOLDED side.
Take your right pocket, match outher corners and sew a line in the middle off the smaller pocket so it is attached to the bigger ánd is made into 2 pockets.
Pfffff, whipe the sweat off your face, admire your work and dream of all the places you want to travel to...
I hope this story makes any sense. If it doesn't, let me know, it's a lot easier to sew than it is to explain how to:)