All depends on what type of stickers you are talking about. You can buy sticker paper and have someone or yourself print the munzees on the paper. You can use weather proof labels, waterproof paper, you just have to protect the munzee from the elements as much as you can. Right now we printed the munzees on a wide format printer( for construction plans) and cut them to size, heat laminated them then trimmed the excess laminate and ran them through our sticker machine. The machine just adds the glue and the paper backing on the back of the munzee. Check out other threads on how other people make stickers.