I really thought the mouse would have, as indicated, a length of 97 mm; This would correspond to the length of my previous mouse, which I find super-handy. In fact, it is viiiiiiiiieeeeeeel smaller. Accordingly, fingers and brain had quite change. I find it almost too small genuine and had wondered whether I should really keep, but the beautiful sunny yellow color has crept into my heart. Go you go, but at home I find a larger mouse more comfortable !!!!!!!!