I don't ever use ceramic on floors so that would not work for me. As for polished I have had polished tile in many bathrooms and never had a falling issue even with kids . Usually water on the floor is from the shower and you have a mat to stand on and the other at the sink where usually you are not wet.. I use 12 x24 porcelain tile on both batrhoom floors and shower walls all the time some polished some matte I actually find the polished easier to keep looking good.

"I don't ever use ceramic on floors so that would not work for me. As for polished I have had polished tile in many bathrooms" What kind of polished tile did you use, @Patricia Colwell Consulting? Porcelain? Stone? Why do never use ceramic on a floor? Many people use ceramic and porcelain interchangeably. Is the distinction important here?

ETA: I have polished tile in my bathrooms, @rondadisk. No slipping issue for the reason Patricia mentioned: mats. I wouldn't feel safe stepping with wet bare feet on a polished tile.

"I don't ever use ceramic on floors..."

"I use 12 x24 porcelain tile on both batrhoom floors..."

So, which is it? You do use ceramic on floors or you don't? Porcelain is ceramic (although not all ceramic is porcelain).

As others have posted, it is the COF that determines whether a tile is safe for floors in bathrooms and polished or unpolished is not the determinant.

In my personal experience it is the size of the tile that makes it safe because it is the grout that enables my feet to adhere firmly to the floor and not slide when my feet or the floor is wet - or even damp. When I used a bathroom that had large tiles with relatively little grout (12" x 12") the surface felt like ice and I had to be extremely careful about where I placed my feet lest I suffer a potentially dangerous falls,

I have marble tiles in my bathroom (same ones as used in the shower) but they are small and so have lots of grout. I didn't want to rely on mats to cover every surface of a floor where I might potentially step because I liked the way the floors look without rugs or mats and I don't want to clean around a mat. FWIW, I lay down a towel outside of the shower so that I don't drip excessively when I step out but the towel goes into the hamper when I am done.

And don't forget grab bars when you are building the shower - they are as critical to safety as a COF tile or grout.

Reading Helen's comment above about cleaning around a mat prompts me to specify that I use lightweight shower "mats" or towels that are easily removed and laundered. They're not thick mats that stay in place all day. I usually move it after the last shower for the rest of the day. Also, we have a small bathroom so only one of these "mats" is needed. I wouldn't want to cover a beautiful stone floor with mats or carpets either.

We had a polished master bath floor and loved it! No issues

COF is <.42- not sure if that is good or bad. size is 24x48 so not much grout. And it’s actually porcelain. Thanks for your thoughts!

Now educating myself- seems that COF <.42 is not ideal for wet floor. Does anyone have experience with sealer products to add grip- such as Polish Grip by Slip Doctors?

rondadisk, I wouldn't count on adding a product to decrease slipping possibilities. If renovating a bath, I'd want the 'correct' built in. Slippery isn't something to view casually, it can be life altering. Please, there will be something beautiful and safe for your bathroom.

Years ago in the first bungalow we bought, there was a shiny sheet vinyl in the master bath and adjacent walk through closet. That material was like a skating rink with wet feet, I've never seen anything like it before or again. It was in the kitchen, too. And a few years before we could afford to replace. We survived it being so young, but I wouldn't tolerate it now.

Lets get to some facts.

The current test since January 2014 is the Dynamic Coefficient of Friction (DCOF)

Also note that these ratings are for a level surface and do not account for a sloped shower floor or any other sloped surface for that matter.

DCOFBrochure_Aug2013_Comp.pdf (tcnatile.com)