I apologize. The inner sheet size was B7 size. I have corrected it. Feel free to ask about different colors, multiple of the same color, and combined purchases with stickers. Thank you for viewing! B7 size sticker book binder Includes 10 sheets (with protective film). There's also a hole for attaching a keychain. You can use it for sticker books, of course, but also for planners, files, and various other purposes. Sticker book, sticker backing paper, sticker book backing paper, clear refills, sticker book refills, transparent refills, B7 binder