Dottie - I could not have done this without an educated designer - it's not just about the design choices although I would never have come up with design choices as my brain isn't hardwired in those kinds of visually imaginative ways. I can appreciate things but I don't know how to pull them together and I wouldn't have the ability to figure out where to even start in terms of the sea of vendors. I am good about researching appliances and functions but get lost in the sea of visual possibilities :-) And I can't even imagine dealing with codes and such since Los Angeles is code crazy - I wanted to move some floor electrical outlets up a bit from the floor as I found it difficult to reach them when I had some hip issues so I was thinking about for the future - I was told that if I move a plug, the whole thing has to be rewired back to the panel box. And the darn kitchen sink has to be approved by the UL LOL - who would think a kitchen sink could be dangerous.

Slate tile is a great choice. I have it in a washroom and we love it. But it does tend to feel cold underfoot. Any chance you are considering under floor heating in that bathroom. We got brushed slate, which means that there are no rough edges or shaling going on. We got a dark grey colour but I also saw it in other colours, lighter grey (almost a greige colour), a green colour and some that was closer to black but had some significant rust colour in it. If you have a look, you should find it easily and it came in many sizes as well. I like something like 12 X 18 or 12 X 24 tile for flooring. When you say you want to use it in the shower as well, do you mean on the floor of the shower? If so, then you'd need much smaller tiles for that to accommodate the slope needed towards the drain in the floor. But you can likely find the same stone in smaller tile sizes. I recommend the brushed slate for the smoothness. Some slate I looked at I felt the ridges were enough to catch your toe and some were quite sharp feeling as well. I think that could look really fantastic with a white subway tile. Have a look at some of the handmade looking tiles. That might go really nicely with the rustic look of the slate tile for the floor. Have you chosen a vanity? We went with a pearly grey colour and that was the colour of grout we used as well and it looks great.

What about a pattern for the floor? And you could do a larger format subway in the shower walls? I’m doing this on the floor of my small bath https://www.lowes.com/pd/Satori-Nouveau-Circ-7-in-x-7-in-Matte-Porcelain-Encaustic-Floor-and-Wall-Tile/1001220890

Schluter makes inside edging the could have used in the shower inside corners and along the base. Do you have photos of the shower before the tiles were installed? I’m concerned about the waterproofing.