Uhh... The smaller books are the size of most books. Like this.

[ Cue him making hand motions of your regular sized book. ]

Then the bigger ones are more like... double that?

[ He's...trying to make a size comparison! But he's also not in the standard coach right now so he's guessing. Enjoy his hands making a larger square-ish shape anyway. ]

Like this? ... It won't fit the printer - or a scanner.