I suspect the width of the marble has to do with the structure under it. I'm sure that has been in for some time. Why didn't you ask then?

Ask your contractor. We can't answer this question for you.

The width of the structure under it is 6 inches and change. The extra 2” makes it look a lot bigger (to me). Shower threshold size hasn’t been at the top of the list of seemingly 3,000 decisions I’ve made for this bathroom remodel. Lol. Maybe 8” is normal and it is just me. That’s what I was asking. Is it just me or does it look wide?

The threshold piece should be no wider than the threshold itself, including the tiled sides. An overhang could provide
a trip hazard, but more likely it could be more easily broken without proper support.

I just looked at my curb and there’s no overhang. It’s about 6” wide.

Why does the stone look rough on the edges?

It looks like in the construction part they used 2x6 boards and so the curb "grew".

AJCN - that is just a leveler tool sitting on the edge of the curb.

Skippack - u r right. It started with a 2x6 and grew. Talked to tile guys this morning and contractor comes in an hour but it sounds like the ship has sailed. Not sure anything can be done at this point that doesn’t involve ripping the wall out and the shower floor tile. ☹️

That's a pretty big step to take exiting the shower with wet feet. If it can't be narrowed at this point, then have a weight bearing grab bar installed just outside that area. You want to grab the handhold, then step toward the bar across the threshold and not have the bar behind you which puts your center of gravity leaning back.

At most, they can shave off about an inch to the curb pieces and reinstall. It's likely not worth the effort.

Much wider than ours...also looks like a real danger of getting foot caught under the overhanging edge. Ours butts against the tile that comes up from the floor with a smooth rounded corner. Just the width of two 2x4’s with the cement board and tile applied. We used marble thresholds straight off the shelf.

I learned that tile on the vertical side of it will make it flush so there is no small overhang. The reason it is big is because the attached pony wall was made with 2x6’s for extra stability, the plumbing and a niche. So the curb had to be 2x6 too extending from the pony wall. When adding durrock and tile and thinset, it is 8”. I think when the shower glass, the tub beside the shower and all the big vanities are in, it won’t look so big. I hope... lol

The threshold is absolutely too wide for the surrounding. The threshold would need to be demoed n replaced.

Karen - does that mean the wall would have to be demoed too and replaced with a 2x4 wall instead of a 2x6 wall? I don’t think I can have a 2x6 wall and attached 2x4 threshold. Transitioning from the wall to the threshold with a 2 inch gap would look odd at best if I’m thinking about it the right way.

Our curb is also just about 6", with a pencil bullnose trim front and back to round off the edges.

I would have two concerns about this, aside from whether it is more hazardous to have the wide (slippery) step across. One is if they plan to leave the straight edge on both sides - that would hurt, I think, if you missed and stepped on the edge with a bare foot.. (But if they add rounded trim to both sides that's a little more width added as well.) The second is where the enclosure will be mounted. If it's mounted in the center of the curb you're going to have a ~4" ledge on two sides inside collecting water on the flat surface unless it slopes slightly to the inside. If they mount it further out to gain more elbow room inside the shower, that ledge will get bigger.