Need a proper size mouse

I've got a similarly sized hand, and have tried many many mice over the years. I've always come back to the DeathAdder (currently using the DeathAdder V2 Pro). It's the best balance between ergonomics and performance. I've also tried the Razer ProClick, which is a bit bigger, but the DeathAdder's shape seems to fit my hand a bit better. I also prefer the DeathAdder's charging dock over the ProClick's wired charging only. Granted, I can use the smaller mice (i.e. Razer Atheris) without too much of a problem for short sessions. If you've got carpal tunnel, I highly suggest getting a trackpad to incorporate into your workflow. I put my trackpad to the left of my keyboard and use it for gestures and scrolling, which has helped with the repetitive motions my primary mouse hand sees throughout the day.