If you want full freedom of movement, you should opt for a wireless mouse such as this one. The format of this mouse is such that it suits those with smaller hands.
From Amazon
Logitech M590 Multi-Device Silent Wireless Mouse, Bluetooth, 2.4GHz USB Unifying Receiver, 1000 DPI Optical Tracking, 2-Year Battery, 5 Customisable Buttons, Compatible with PC, Mac, Laptop - Black
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