I find it a little bigger for the Razer orochi, and if you use the bag that the mouse came with, it fits but really tight...Provides a great deal protection against bumps and the soft internal ensures that no dust collects or other particulates collect in the mouse lens. Only thing I do not like about it is that there is no space for extra batteries or cables for the mouse in one case.nice addition works great!Perfect for the price, only addition I would add is a protected space for detachable usb cord, a pocket or something.Fits as it should.I do use it for my Orochi.Good purchase.Perfect fit for the Orochi.- Maximo Caggianosmells like death but works as needed A-excelente