I'd say just about anything shorter than the width of the bag (13 inches) will fit. The picture I saw of the bag on Amazon shows a netbook with a bunch of other electronics strapped on top of it, so I expect the bag is deep enough to store one of these compact or foldable keyboards with the edge. I use a SoldTek mini USB keyboard which is 9inches by 4inches and would fit in that bag with the edge without any trouble.