Please post picture of subway tile so we have an idea on what you are using.

Sorry - here you go

It looks nice to continue the shower floor out onto the bathroom floor. Or use the same tile in a different shape if you like, or larger hex’s. Be sure to put countertop material for your curb and any other horizontal surfaces such as bottom of niche or top of pony wall, etc.

Are you putting in a niche? We stacked the tile like you’re doing, and the tile pro did something cool with the niche. It was offset to one side on the side opposite showerhead and he dead-ended it into the side wall.

Where the tile stops in the picture is the start of a ledge running across the entire back of the shower wall. Niches are hard to clean and space limited. The ledge will have the countertop material used on the vanity.

I love ledges. That'll look great and very functional. What's your countertop material?

Black mist granite

I don’t like any of those but I love simple so 12 x24 tile in a porcelain on the floor and shower walls is almost always my choice.

What is the end game? From what you have described and provided I am assuming the hex floor is also white, shower walls are white, counter top is black with just a bit of movement. Are you using white grout? Are your cabinets also white?

In my mind you have to have a pretty spectacular bathroom to pull of the simplicity of black and white and not hit boring.

In this bathroom the wood is the star.

In this bathroom the flooring brings the room to life.

If you have an average bathroom and plan on having color on the walls and shower curtain and shower mat and art, you can probably get away with large format white, black or gray floors.

Here’s the shower finished. Looking at a larger format black or gray hexagon for main floor.