Using a computer without having a mouse is a difficult task. The format of this mouse is such that it suits those with smaller hands.
From Viking Direct
CHERRY Wired Ergonomic Mouse JM-0300 Optical For Right and Left-Handed Users 1 m USB-A Cable Black
Ecprof
JM03002 - Mouse GENTIX black
This product is also available at 5 unverified stores.