The ruler in the photo for scale is 15cm long, and is only included for reference. It is not shipped with your purchase. Item is authentic. Comes from a no smoking home, but I have pets. If you have any questions, please message me. If you are buying internationally, I may also be able to provide somewhat discounted shipping rates, if you ask. For flat items, such as cards and stickers under 20 dollars, if it is not already offered, I can offer envelope shipping upon request.