It’s easy to figure out why e-readers and tablets are the size that they are: They’re all about the size of paperback books, whether trade (iPad) or mass-market (the Kindle 3). Some oversized models, like the Kindle DX, are closer to big hardcovers. But why are books the size that they are? It turns out it’s because of sheep. Sheepskin, to be exact.
Carl Pyrdum, who writes the blog Got Medieval while he finishes his Ph.D. in Literature at Yale, has the skinny on book sizes. You see, before Europeans learned how to make paper from the Arabs (who’d learned it from the Chinese), books were made from parchment, which was usually made from sheepskin. Sometimes, they’d use calfskin, too; if it was really primo stuff, it was called vellum. Like reading a whole book made out of veal.
I love the "book made out of veal" quote!