Let's make a simple, cheap, durable bifold wallet out of Tyvek (the housing wrap and express mail envelope material).
Please note: this is my first instructable.
Step 1: Materials and Pattern
Materials: 6 x 14.5 inches Tyvek or fabric of your choice (duct tape, 1000 denier nylon, denim, rip-stop nylon, etc), 3 inches of elastic (almost anything will work), optional: zipper, velcro
You can either sew the wallet together (which I am doing), or tape it together with packing tape or duct tape or another suitable tape.
This is the pattern, all measurements in inches. No seam allowances are needed.
If this image is unreadable:
the main body is 6 x 7.5
the small flap is 0.75 x 2.5
the large flap is 2.5 x 4.5