Umbra Prisma Wall Mirror, Black

What is the length and width of the total piece at it's top to bottom and left to right measurement - total in inches?

I want to hang this mirror in my tiny bathroom across from the medicine cabinet so i can see the back of my head. Will the 3D design block the view?

are the mounting brackets on the back all i need to attach to wall nail or hook or do i need to do something to back bracket?

Is it possible to take the mirror apart from the framing? I would like to spray paint the framing a different color.