This tri-fold wallet is light weight, is very thin, can take up to 12 credit cards and even got a change compartment.
This is all you need:
needle and thread
piece of double sided tape
Step 1: The cutting
Step 2: The folding
Open after folding and now fold the upper quarter and bottom quarter to the inside towards the middle crease. After doing that close the first fold again. Make sure you make good creases.
Step 3: The Tucking (I)
(This part will be the part were you put your much used credit cards)
Step 4: The Tucking (II)
After folding and creasing, take the little piece of double sided tape and put that on the flap near the crease and fix the flap. Take just a little piece of tape so you can easily open and close the flap when you are using the wallet. The double sided tape is not really necessary, my experience is that the flap is large enough to stay fixed by itself.