Step 4: Close the Wallet
Make two folds to turn it into an actual wallet. One to separate the two sections, the other to serve as a flap o keep it closed.
Might help if you look at an actual wallet, for dimensions.
Tuck the "flap" into the main cash area to keep it closed. I was gonna design a proper flap, but thought it might be beneficial to mow the lawn.
Once again your folds need to be pretty rounded if you don't want the wallet to skew.