Thank you for viewing! т т They are attached to a backing sheet, so you can just slip them into your sticker book, which will increase the thickness > ·̫ < Also, this is highly recommended for those who value extras!! This time, I've included more and more luxurious extras than usual. (From 1 sticker to a whole Bonbon Drop sticker, the amount will be increased depending on the stock at the time! Currently, there's a chance to get more extras! *Please refrain from complaints regarding the contents of the extras.) Of course, the set itself is great, but If you buy in bulk, you'll get "even more extras"! If you're interested, don't delay! Bonbon Drop Stickers Tamagotchi Stickers Sticker Book Official Product Nakamura-kun Heisei Girls Drop Stickers Sanrio Hello Kitty Kuromi Food