Contour Mouse is ergonomically designed to support your hand comfortably without the need to clutch the mouse to control it. Excessive clutching and finger flexing can aggravate the hand and wrist resulting in repetitive strain injuries. The mouse has a thumb support and helps RSI sufferers by easing pressure on the wrist.

Find the Perfect Fit
The table below is an aid to help you determine what Perfit Mouse Optical size you will need. You should measure your hand size using a ruler and compare the result to determine the recommended size.

  • Measure on the palm side of the hand, from the tip of the middle finger to the first wrist crease with your hand held flat
  • Compare your measurement with the table below.

Note: If your hand measurement is between two sizes and you have a relatively thin hand, select the larger size. If you have a thick palm you should choose the smaller of the two.

ImperialMetricMouse Size
6-3/4″to 7-1/2″17 to 19 cmMedium
7-1/2″ to 8-1/419 to 21 cmLarge


HANDEDRight handed, Left handed
SIZEMedium, Large

Additional information


Left handed, Right handed


Large, Medium


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