Your sconces are too high. They should be at eye level. The shades are too wide, leaving you with a mirror only the width of the sink, which will look odd. The time to plan all this out was before the wall paper was hung. I would bite the bullet and do it right instead of trying an imperfect fix.

Ya, the problem is not the height (they’re at the highest recommended height of about 70 inches) but that they’re too close together (damn builder). Theres only about 15 inches between them, so maybe a tall, skinny mirror, or yes, I like the shape InDesign, if I can find something that tapers.