Wired computer mice might seem archaic, but they're incredibly easy to use. The format of this mouse is such that it suits those with smaller hands.
From Amazon
Cooler Master MM730 RGB-LED Ultralight 48g Wired Gaming Mouse - 16K DPI PMW3389 Optical Sensor, 70 Million Click Optical Switches, MasterPlus+ (32K DPI, PC only), Ergonomic - Matte White
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