For a high quality, eco-friendly, and expandable paper wallet that will last you years check out the Tyvek wallet from
PAPERWALLET.
www.paperwallet.com
To create your own paper wallet from a normal piece of paper follow these instructions:
One sheet of 8.5 by 11 paper folded, with minimal cutting, and one piece of tape = durable, seamless, useable, write-onable, minimalist wallet.