Here comes my own version of the paper/tyvek wallet !!
After studying all the versions of those who already posted their I ended up making my own out of a document envelope.
So now I want to give back and share it with you.

I can already hear you saying: "Oh no... not another paper wallet, does the world really needs one more?" . Well... may be not, but this one has some differences with others that you might like:

- First it's a "traveler version" : it has two main notes pockets to store your money . You could use that in case you are traveling and need to keep different currencies like dollars and/or euros, pesos, crowns... you name it. Otherwise you might keep small notes (1, 5, 10 dollar bills) and big notes (20, 50...).

- One of the money pockets has an extra security feature to prevent notes slipping out of the wallet (using the closing lip of the envelope)

- Other than that it has 6 more pockets for subway tickets, credit cards, business cards, etc...

- Last it has one different not common among other paper wallets. In this wallet every 2 layers of paper/tyvek form a pocket you can access and use, while sometimes paper wallets have two layers of paper one over the other that are not usable and end up only adding to the thickness of the wallet but providing no other feature. This version might result in being 1/4 less thick compared to others

Step 1: Materials and Tools

-materials:
one paper or tyvek document envelope, A4 size
tape

-tools:
xacto knife
scissors
ruler

Step 2: Step 1

Find the half of long side of the envelope.
You'll have to cut a millimeter or less of the side of the envelope (the folded part) going from one mid-point to the other passing by the closed side (bottom of the envelope. In the picture the parts you'll have to cut away are marked in pink.
You'll end with the bottom half of the envelope looking like two separate sheets.

Step 3: Step 3

Make sure that the glued closing lip of the envelope is against the table. Cut away bottom half of the side facing up as shown in pink in the picture.
You have 3/4 of the original envelope now.

Step 4: Step 4

Get the remaining bottom part and pass it inside the envelope. Once all the paper is under make the fold sharp and flat. Your envelope will look like a half of the original but with the opening along the long side.
Along the opening you'll see the two main money pockets already there.

Step 5: Step 5

Fold the envelope in 4 (ignore the closing lip of the envelope)
Now use the Xacto knife and cut from the center of the envelope (where the two new folds meet) to the bottom side of the envelope along the fold you traced.
Make sure to cut all 3 layers of paper.

Step 6: Step 6

Fold the envelope in half again. You'll have three layers of paper in bot the left and right side. Those 3 layers will form the other 6 pockets of the wallet.
Draw a "lemon shape" on the top layer like in the picture. Be sure to leave about 5/8mm on both sides at top and bottom.
Cut away the lemon, making sure to cut only the top layer and not the other two under it. You might use some cardboard to protect them and not cut through.

Step 7: Step 7

Now to the second layer: draw a line connecting the 5/8mm points you left before. Also in this case make sure to cut only the second layer

Step 8: Step 8

Now get the third layer and fold it over the other two and make the fold sharp and flat pressing down firmly with the nail of your thumb or other clean tool.
Once the fold is formed make it go over the second layer and under the first, inside the pocket. You might want to trim the corners a bit to ease the insertion.
We are almost done !!

Step 9: Step 9 - Tape

Forming is done, now it's time to tape it!
Get a piece of tape and fix the fold you did in the previous step so that the lip you put inside will not come out. Repeat for both sides.
Next get another piece and look at the picture: the pink ribbon is where your tape must go, linking the inner part of the money pocket to the small card holder. Try to be precise and have no leftovers of tape.
Next tape the sides of the wallet.
(In the picture the pink ribbon is in the wrong direction: you want to tape it along the side). Repeat on the other side.

Step 10: Step 10 - Almost There

Fold the original closing lip inside one of the main money pockets. The lip can be used to ensure the notes will stay inside, or to "hide" documents etc.

DONE !!! Enjoy your new wallet and his many pockets in the minimal thickness possible ever.

In the pictures the red cards show all the pockets you have and how to access them.

Step 11: Using Your New Wallet

Tyvek is an incredible material, but sometimes it is too slippery and might pop out of your pockets (happened, not nice). To prevent this you might use a regular rubber band around it that will provide all the friction you need to let the wallet rest where you want it to.
Those wallets are very durable, I used mine for about 6 months. After that it started getting a bit ruined and dirty, it looked like it was falling apart but it was just the look since it was still completely functional.

Also as a traveler I like to use this as my "MAIN" wallet: it is so thin and light that can be put in a money belt without being bulky. Then I can use a regular cheap/old leather wallet as a giveaway-wallet or mugger-wallet (video is not mine)