Its standard here for marble flooring, we go to the warehouse to pickup a slab usually around 8'x5' or more then discuss the final tile cut size to minimise wastage before the installer drylay the marble in the factory to arrange the veining (also to place less desirable tile under furnitures etc). I'm in the process of laying 27"x51" size marble tile for my flooring, still deciding whether to have the veins move vertically into my room or horizontally across it.

I like those last 4 x 4s on the floor, Beth. But they are not the pure white glazed tiles, they have some variation in color and shading. And they are not paired with identical wall tiles. I don't think that using the same 4 x 4s on both will work well. It will look like the homeowner found a sale and either bought too many or could not find the funds or the imagination to do a different floor. Organic Cook, how about using a large format hex tile on the floor, like the ones in the green and black bath and the white baths just above? It has a nod toward the vintage, by going hex on the floor, with a foot in the modern by not doing mosaic tile. They come in 8 inch size (maybe larger), so will decrease the number of grout lines in comparison with the vintage mosaics. You could look at a nice tile with some variegation, like the 4 x 4 floor above has. You could look for a color that is related to whatever the floor color is in the hall, so that the floor color flows between the rooms. If the hall has a wood floor, look for a tile that has about the same amount of color as the two tiles in the last bathroom in Beth's post above mine. Not a wood-look tile, but a glazed or color-body tile that has tones that tie into the hall flooring. Another idea would be to go back to your original choice of gray and white. Here are two 10" hex tiles from Tile Bar that would look good with white wall tiles.This one is a cement-look porcelain at $6. I love the variegation in color. Link This one looks like it may be beige, which would go with some wood floors. This one is at Home Depot and is more expensive. $15.95/sq ft. If you go to this link, there is a video that shows it grouted with both white and dark charcoal or black. Wayfair has this Carrara-look hex on sale. They show it with dark grout, too. $7.51 sq ft. I can't get an image saved to my computer, so I can't post it.

Where are you located? Here in CA tile showrooms are not completely closed. They will make a one-on-one appointment and let you in to look and get some samples, with everyone wearing masks. Many companies are also good about mailing samples. I requested a sample from Porcelanosa last week and they mailed it immediately and I got it 3 days later. The problem with the marble look tile samples is that they are cut from the larger tiles and the colors you see in your sample could be the main color in the tile or a very very tiny part of the whole color scheme. You can also look for online photos of the samples you get, to see the actual patterns when installed in a whole room. There is a wide variety in the overall look of marble-look tiles, ranging from very grey/blue to very beige, so I would not want to commit to something from a tiny sample. Can you wait to finish the project?

Good to know. I would be really interest in doing this with the marble set to go on the shower wall and shower floor. Do you have any recommendations on sealer? And also, would sealing the stone to the point that water beads off make it slippery? Currently debating what type to use. I did one mock up with the same tile laid the opposite way to be able to make it slope accordingly (laid a line and cut from corner of shower to corner of drai)as well as a basket weave design. Reason is wife like the basket weave and it’s better for grip. I prefer the other one as less grout and less so less maintenance and seems to flow better. We r planning on a geometric design feature wall where the valves and shower head is as well so I think it would look busy but eh...happy wife...