This Jorno Bluetooth keyboard gives you the full QWERTY experience but folds up into a very small package. The keys themselves are only 15% smaller, but appear to be plenty big enough.
I'm looking forward to try out the keys and bluetooth connection for myself, but I'm also interested in the folded size.
Folded out the Jorno is 8-1/2 x 3-1/2 x 0.3-inches. Concertinaed closed it measures just 3-1/2 x 3-1/2 x .9 inches, and weighs 8.8 ounces (folded up and opened, obviously), this includes the li-ion battery which is supposed to last a month.
I have made a request to Jorno to get a sample to review and subsequently GIVEAWAY. But you can still pre-order a Jorno Folding Bluetooth Keyboard for $79.