The mouse its self is about the width of a normal mouse but flattens out with a solid click to a portable size. Its quite comfortable with prolonged use and it also looks great, had quite a few comments on it and were to get one. the magnetic dongle storage is great and feels solid so little chance of it getting lost easily. over all the mouse feels well made and of fairly good quality materials. I would highly recommend this to anyone in the market for a comfortable portable mouse.