Step 1: Hamburger Fold Squared

Neatly fold the 8.5"x11" sheet of PAPER in half. Open it, and fold the two flaps into the middle, so it is split in 4.

Step 2: Fold in 1/2 and Then Crease

Now fold the paper in 1/2 perpendicular to the other folds and crease from the folds you just made. notice how it has a natural tendency to stay closed, this is the basic wallet shape. now unfold.

Step 3: Cut

Cut along the black lines (viewed from the inside).

Step 4: Fold Flaps

Fold the 2nd and 4th flaps from the top inside on either side.

Step 5: Tape

Tape the lower cut (not the DIAMOND) so both sides are flush, your paper will not be flat anymore.

NOTE: this step can be done after step 7, it will be harder, but the wallet will lay flatter and be more square.

You can also PUT a small piece of tape at the top of the diamond (on the 2nd panel down)

As this is now the WALLETS weakest point

Now refold, like in step 2

Step 6: Crease Again

Neatly crease the wallet starting from the back to the edges. 2 flaps should be sticking out of each end of the wallet.

Step 7: Zipper Folding

Lock both ends separately.

Starting from the inside, and going to the outside, there will be a flap, then a pocket, then another flap, and another pocket. Let's call them 1,2,3,4 . Fold the inner flap (3) into the inner pocket (2), then fold the outer flap (1) over 2 and 3, and into the outer pocket (4). Do the same to the other end.

I recommend taping flap 3 inside the pocket to hold the wallet together better.

An you're done! Enjoy!