Gigabyte GM-M5050 Curvy Optical Mouse - Black

Low price, gets the job done. No extra buttons or fancy shapes or gaming-level sensor, but that's OK for me. Had one for 4 years (use computer 8 hours a day almost every day) before one of the buttons stopped working, so I bought a replacement. I have a hard time finding a mouse that doesn't cause cramps and carpal tunnel. Everyone's hand and arm posture is different. For me, I drop my elbow too much, I have a small palm and slightly long fingers. I use a claw grip while dropping the center of my palm onto the butt of the mouse. The mouse is narrow and long with rounded surfaces. I tried some expensive gaming mouse, but this one was better for me because the butt is taller, which is good for my lazy elbow drop. And the plastic is that classic "sticky/glossy" plastic, which helps prevent my hand from sliding backwards and putting my wrist on the table. The newer mice are made out of some kind of matte/smooth plastic that has low friction against my palm. Everyone's anatomy is different, so what fits me may not fit you. It's best to try mice in person, before buying.