Stickers are printed on stock that has an adhesive backing to it. There are many custom options available as well from our custom quote link at the top of the page. The additional options to consider are stickers used for food products, water resistant uses or outdoors as an example. Standard sticker stock is primarily used for indoor use, be sure to request a custom quote if you have other requirements or concerns. Die cutting is also another option you may want to consider offering to your client.