In my 30 square foot master bathroom I used 1 by 1 inch tiles so I can't really picture such big tiles in a small space.

maybe use the square tiles if the space is square, and rectangular if the space is rectangular? I'd be more likely to use rectangular on the walls I think.

Small rooms don't require small tiles. Consider large tiles but set diagonally for the floor. Not the same tiles on walls and floors if you're using shiny tiles.

I would recommend you this kind of rectangular tiles for bathroom walls if you are looking to design small bathrooms. I personally think 30cm X 60cm would be a big size if you are considering for small bathrooms. I am going to share few more small bathroom designing ideas with you and to confirm the size you can also try this ruler to measure tile sizes while visiting a shop to purchase.

Here are few more tile designs for small bathrooms:

These were my suggestions and you are open to oppose them if you don't like.

Old thread

You may use either size tiles. There are no rules.

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