Unique design by Hailey designer. One happy dude birthday stickers are designed with checkerboard smiley face theme, so cute. birthday sticker is a good choice for boy one happy dude birthday decorations. Personalized birthday stickers are made of self-adhesive paper. They are sturdy and odorless with nice adhesion. One happy dude party favor stickers are easy to stick smooth and clean surface, and peel without leaving residue. Round one happy dude stickers can be used in different occasions, such as envelope seal, card, gift bag, package and so on.