The bags were already wrinkled from being handled before, so I decided to add more by crumpling the whole thing up. I then traced another envelope to get the desired shape and style for my new one. After I cut the shape out, I folded the flaps, glued them together, and put my outgoing mail inside.
Surprisingly pleased with the outcome of the textured pattern, I decided to make another one. In the end, they were so cute, and I didn't want to send them off.