Below is a link to one that is available in different widths and is frameless and recessed. Were you wanting/needing surface mount or recessed, or does it matter? Might Something like this add some additional storage when mounted to the inside of a vanity door, if you have a vanity with doors? They can be found various places in various sizes. They would also maybe have to be lined with something to keep smaller items from falling through...ie fabric, contact paper, etc. Sue Here is a link that might be useful: KOHLER K-CB-CLC3526FS 35-by-26-by-5-Inch Double Door Aluminum Cabinet

Natal-It's the large Cartwright we are considering. Thanks for the additional info. re: the width. That may or may not help. In my last post I included a pic. that shows my main dilema which is a wall the butts right up against one side of the vanity. I will also try a mock up but I was just wanting to weigh my options since I don't have much faith in being able to use the side sconces.

I installed a pair of these skinny Kovac fixtures in my bathroom remodel and they have been great: Kovacs sconce The backplate is less than 5" wide. The fixture comes in a variety of finishes and bulb types. I chose the halogen version because it puts out the most light (120 watts per fixture). Here is the kind of light they provide:

Thanks Skilz— I hadn’t thought of any of that- The current medicine cabinets insets have a 15 1/2” box width. The mirror width on these new ones is 22 1/2”, so I think even that white inset is larger than what would fit between studs. It looks from photo like 18”. The wall is non load bearing, and on second story with non floored attic above. There is currently a sconce above the mirror but that will change to side sconces. I think that wiring will drop down from the attic like the closet light in the next room over but i don’t know. There is no plumbing in that part of the wall. So it sounds like I will need framing for the medicine cabinet that is an inset, so is it possible to Recess the brown cabinet that was meant to be wall mount? Thank you in advance!