8.5x11 sheet. Be sure to chop them up so you have room to write your name on them! The plates are all the same size, so it shouldn't be hard to do that. Rubber cement or some other suitable adhesive will stick these in your books! The ones you want people to give back to you, anyway. ;)

These are really basic. Please play with them if you want to spruce them up.

I RECommend using the logos according to your books - e.g., coffee table photography books should get the image logo, dictionaries and such should get the reference logo...