The Edirol PCR-M1 keyboard controller is just less than 45cm wide, 22cm high, 3 cm deep, incorporates 25 standard-width keys and is ideal to use with a laptop computer.
The beauty of this unit is its compact size. The keys are shorter in height and have a shallower action compared with full-size keys but they do feel surprisingly sturdy as do all the front-panel controls.
Unfortunately, the Edirol PCR-M1 is now discontinued so if you'v ever wanted one of these sleek keyboard controllers, now is the time. There is no replacement model.