Do you have to get special tile for the curved wall; do they make curved mirrors?
Your bathroom is quite elegant!

I would be tempted to get the wall built out to flatten it

the wall is convex (to remember: concave curves in, like a shallow cave).

I agree with snaggy, build out the entire vanity and flatten the back wall (is there room for that though?). what is behind behind that wall? can you carve into that space?

or if you must keep as is. for the mirrors, maybe something with a slim frame and hidden brackets, also remove the one in the middle. you might be able to get away with something about 2-4" wider than these. you could test that out with cardboard.

this wall looks kind of plain. consider paint it or small accent tiles.

Thanks for you input. Meant to say convex. not able to build out wall. Behind the wall is foyer (spiral staircase) so can't use that space. keeping cabinets and painting another color. Will be tiling the wall behind mirror with small accent tiles.

https://www.houzz.com/products/query/oval-bathroom-mirrors/nqrwns

what about 2 oval shaped mirrors? Maybe the kind that attach by side brackets & stand away from wall? Link above to examples. What kind of tile is going up? I see the white with black border in reflection in mirror

ha, yes -- sorry to correct you, I mainly meant to offer the memory trick. I forget this kind of stuff all the time!

my face when I'm trying to remember the right word in a conversation:

I would stick to just two mirrors, probably something smaller scale. I would probably go for something less tall and skinny than the current mirrors. I really like @Therese N suggestion to consider using a pivot mount mirror like the last one.

An oval shape could be fun.

The entire bathroom will be retiled. The small blue/grey tile on the right will be for the wall behind the mirrors. The large tile will be the floor and the grey tile on the left for the shower.

cabinets to be painted Benjamin Moore - mineral alloy

@grsmarjes really nice tile combo!

Mineral alloy is great color. Boy, I would think long and hard about tiling that curved wall! You probably will make a mirror choice be the post style or go nuts trying to get hardware to put into tile for hanging mirror. I wonder if you might paint that wall the mineral color, hang or mount whatever mirrors you choose and then tile a strip centered over cabinet in middle below. I will sketch it for you in a minute. Bbl

Can you send the sketch? Thanks!

Wall-mounted extension mirrors are the way to go.

I guess I am just dumb....how are you going to lay flat tilt on a curved wall?

Tile

Skinny tiles, or small 1/2” tiles work on curved walls. Mounting mirrors trickier.

agreed with flo, anything 1" or smaller will work just fine. people tile curved walls all the time, and the curve in this room is not that sharp. I've seen some skinny mosaic tiles that would look fantastic here as an accent.