What is the vanity, what is the counter top, WHERE is the bath you are doing?

This floor and then what?

What polished on walls, what is on the shower floor?

and SHOW the bath you are doing.....so we do not have to divine?: )

Matte finish on floor tile, great! Slipping could pose a problem on polished floors.

polished walls depend on the lighting in the space.

think about a small space with a glare on the tile.

Yes, those tile sizes work really well for your bathroom. The 12" x 12" matte checkerboard floor adds character and good traction, while the larger 12" x 24" polished wall tiles will make the space feel more open and elegant. The mix of matte floors with polished walls is a timeless pairing that balances contrast and cohesion.

The sizes are fine. Unless you are a glutton for punishment, use porcelain, not natural stone.

I like 12 x24 porcelain tile for both bathroom floors and shower walls to keep a small space lika e a bathroom from being too busy. It allows changes down the rod like wall color or accessories with no huge expense .. IMO checkerboard design works best in large areas and we need to see your bathroom and the tiles you want.

" Yes, those tile sizes work really well for your bathroom. "

@Toupin Construction, you know that how from the little info offered?

I'm planning to remodel my bathroom, which measures 9 by 10 feet (this space includes just the shower and vanity).

We have been in the remodeling industry for over 40+ years. If you aren't able to give helpful information maybe go check out nextdoor - it might be more your fit.