Individual walk-in shower floor tiles should be four inches or less in order to increase slip-resistance," says Vern Yip, author of the new book Color Pattern Texture: The Foundation to Make Your Home Your Own. "The increased number of grout joints provides more traction. Smaller tiles also more easily conform to the slope of the underlying shower pan to support positive water drainage.
Although I'm an architect with a care for historic fabric, the function just didn't work for us. We're tall people, and the sink was so low and had a small leaking issue. The toilet, while amazing in its pink glory, used so much water. And the shower head was at about shoulder height on my husband - not a desirable shower experience.