I would use the shower tile for the outside curb. In my mind, it’s part of the shower.

The outside of the shower is outside. It should be the room floor, and the room floor choice needs to have cove base available to go all the way around the room. If it doesn’t have cove base, pick out one of the colors and use Daltile’s Color Wheel line, which does have cove base.

Thanks but we are using regular baseboard, everything is waterproofed. I think cove base is better suited for either a commercial bathroom, or when the walls are tiled as well. My walls are not tiled and in my opinion cove base would only move the floor tile line further into an already small 44 inch wide bathroom floor.

I think you have several options & each will work. What is the cove base / baseboard around the room going to be? I see from pic that will run right up to shower at least on that left side so I’d like to know what that answer is before voting for it. Maybe it’s the subway tile or something that looks close to it & laying horizontally for a baseboard?I’m wondering what the height of that curb side section is? Is it an option to use the subway tile of shower walls but instead of cutting pieces to run in vertically across curb, instead cut the lengths of tile to fit horizontally for fewer grout lines. I’d want to lay the tiles along the curb to see how it looks. If you don’t like it then I’d cut the lengths & run it vertically along the curb side to flow with the look & spacing of back wall. I would not introduce another tile element. You’re making a really nice bathroom - love the pink hex tiles!

Thank you! It's going to be the original flat white baseboard that is in the rest of the house. That little 10 inch wall to the left of the shower stall is a conundrum. If I use the subway tile, I think I can end at the end of the stall with the Schluter trim. If it's the floor tile, do I need to run it on that wall to the left of the shower to the end of the floor? I think that would look weird. I think running baseboard up to it might look less weird but I'm on the fence about it. I will also consider laying the tile is horizontal, wow, that's not technically adding another element, I hate spaces where there's too many things going on.

I agree with you about not using floor tile for baseboard & also agree on not using coving for baseboard. Flat white baseboard like the rest of the house is perfect. I have that throughout my home including in baths - 5” flat white baseboard - no detail on it - so I know just what it looks like. I think it’s perfect for your bath. So I’d stick with subway tile for curb or use another piece of the quartz. Acutally, the quartz might be best - a long white expanse, no seams, matches curb top & blends nicely with baseboard! You can see how it looks with the flooring now with the piece sitting there & it’s good. I vote for quartz!

ETA - the 10” wall shouldn’t be an issue - just use the same baseboard as around the rest of the room. I’m wondering if you use quartz for the curb, with the finished ends of the quartz no schluter or anything needed - just butt the quartz & baseboard against each other?

Please do not use modern wooden baseboard in a bathroom that you are trying to give a nod to vintage elements. It is completely the wrong and awkward choice. Cove base was used in all bathrooms for generations, until very recently. It makes baths easy to clean, and provides a professional finishing touch. The look of a room wrapped with baseboard that just stops and butts to tile under the curb is completely wrong. Running it under the curb is the only way to have continuity. Yet that is 100% assured moisture damage. This is why tile cove base was used, and continues to be used. Even high end baths use marble base coved at the top.

Might look nice to continue the shower floor into the entire bathroom floor for continuity.

The wooden baseboard is the same as is in the rest of the house, all original. I'm not using cove base. Every remodel I've looked at in an MCM. Home has not used a cove base unless the wall is also tiled.

I appreciate everyone's suggestions, I will probably use the subway underneath there. I would use the pink shower floor tile but that's just too much pink for me! I just wanted a hint to the original colors.

I would use the threshold material or the same white tile that is on the shower walls.