Then cut another just like it.
Take the piece of the over lapping part of the wallet, the piece that's under the other. Take it and rip of of the tray or cutting board.
Fold it. If you think it's too long, feel free to trim it .
Repeat step 3, but make sure it's the same size as the wallet.
Then cut two pieces a little shorter than the ones you just cut.
You can also add credit card pockets, ID card holders (if you have clear duct tape), and whatever you want. I'll post guides on those too!
Hope this helped you!