I measured my Jetbook and my son in law's Pocket Sony. Each are 4-1/4" wide. My Jetbook is just over 6" long and his Sony is not quite 6-1/8" long about, 1/32" longer than my Jetbook which i"m hoping is negligible. My Jetbook is the non-battery one, so there is no hump to compensate for. If it won't work, I"ll give it to him and reclaim my Jetbook sleeve which he now has.
Will post a pix when it arrives.