The paper used to fold these origami cranes is M & M candy wrappers. The paper is not treated since it is already coated in plastic and polyurethane will not stick to it.
All earrings are displayed with plated brass fishhook ear wires. If you prefer different style ear wire, posts or even clip-ons, simple note it before you check out. (There is a section for order notes right before you go to make payment.) If you have allergies to brass please note that as well.