For hands that are small to medium in size, the Logitech Signature M650 wireless mouse Two-Year Battery Quiet Clicks Personalized Side Buttons Bluetooth for Mac, PC, Chromebook, and Multi-Device - SMARTWHEEL SCROLLING: Graphite Use the Logitech SmartWheel to make scrolling easier for you. When you need to concentrate on the details, get line-by-line accuracy; when you simply want to quickly scan long pages, scroll incredibly quickly. Use a finger flick to switch modes automatically. THE IDEAL SIZEMENT FOR YOUR HAND