To maximize the advantages of this mouse and experience maximum comfort, a correct fit is required. Therefore the hand has to be measured.Measure on the inside of the stretched out hand, the distance from your wrist (the cross over between hand and arm) up to the tip of the ring finger. This length provides an indication of the required size.
Ergonomic, Wired Mouse for the right hand Unique shape: Supports the hand completely and allows the forearm to relax Hand rests on mouse: Design allows hand to rest on the mouse without brushing against the desk