A:AnswerMy imperfect measuring gave me this.
Base width at widest spot:
2"
Widest spot measured from above (It's wider at the top than the bottom):
2.5"
Longest length at base:
4.25"
Height at the tallest point:
1.5"
I like it especially because I'm starting to have connective tissue issues with my hands and this mouse doesn't force my hand to be overstretched.
A:AnswerInstructions come with the mouse, but you can change the light color once you download Logitech G HUB. This is also a wired mouse so you just plug it into your laptop's USB with the wire attached to it.