How to pick right ergonomic mouse?
Know about your hand size.
Simply take a measurement from the base of your wrist/palm to the top of your middle finger. If this measurement is 17.8 cm or more then you are best suited to a large ergonomic mouse. If this measurement is less than 17.8 cm then you are best suited to a standard size ergonomic mouse.
Small: 15 cm or less
Medium: 15-17.8 cm
Large: 17.8 cm or more