Home About Us Contact Downloads Store                   Events Register Video Awards   Find the Perfect Fit   System Requirements Mousing Tips Ergonomic Research Free Ergo Guide Use Two Mice at Once Technical Support User Endorsements News & Reviews Press Releases The table below is an aid to help you determine what Perfit Mouse size you will need. You should measure your hand size using a ruler and compare the result to determine the recommended size. • Measure from the tip of the middle finger to the first wrist crease with your hand held flat, as shown in the figure below: • 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. Hand Size Mouse Size Imperial Metric Up to 6-1/4" Up to 16 cm Extra Small 6-1/4" to 6-3/4" 16 to 17 cm Small 6-3/4"to 7-1/2" 17 to 19 cm Medium 7-1/2" to 8-1/4 19 to 21 cm Large 8-1/4" and above 21 cm or greater Extra Large   Home | Downloads | News & Reviews | Support | Contact Us | Contour Store