A:AnswerThe approximate size is about 3 1/2 inch by 1 1/2 inch and is sized to fit pretty much everyone's handsize, so I would term it a 'full-sized mouse'.
A:AnswerI be using Win11 right now with this mouse, so yes, it works with Win11. Just plug the usb doohickey into your pc and if your pc does a "new device detected", just let it run and your mouse will be workable within seconds, otherwise your mouse should work as soon as you plug in the usb.