Thanks - you don't think the 1/2" (each side) overhang is more likely to chip in a way that it causes a significant break? (I.e., if I use the thinner marble?) There is nothing under the 1/2" on each side.

When I use marble or granite for a curb, I try to limit the overhang to about 1/4" or so....but I see no reason why the 1/2" would be a problem. As long as it is WELL supported with thinset....trust this: you ain't gonna break it by stepping on it with bare feet.

Corian and other solid surfaces are superior to marble in this particular application. You aren't breaking solid surface.

You'd have to try to break that carrara, too. It's one of my favorite curb stones to use. I usually use 3 cm, but the thinner stone should be okay, as well.

Thanks all. Bill: 3cm = 1.2" thick curb? (Must look great!)

That's 2.5x the thickness of mine! Still I should be ok? (I'm near Boston, MA: these Carrara curbs are common (in stock) at many tile shops near me and they are only 1/2" or 3/4" thick. I'm not going custom.)

Seems it wouldn't be too costly if - worst case - it cracked and had to be replaced? (I.e., if I hired the tile guy to come back. The curb is $100. I'm in a very high labor cost area.) No shower glass to remove/replace. And I realize the edges by the existing tile - we're using 3x6 ceramic glossy subway tile American Olean Brights - might get messed up a bit and that's fine. We're using Bright White grout to minimize issues on the walls. (Dark gray on floor.)

Out of stock. When is the restock date?

Close. 3 cm is about 1 1/4".

Amazing that, at least here in SE Texas, all I can find is Carrera or Travertine thresholds. Back when I was in Virgina, Summitville Tile used to have, on display, probably 25 or more thresholds....dark brown, red, green and anything in between. Sure, some of them were twenty bucks or more, but for that, who cares?

Up here in Maine it's Carrara or the tan epoxy thresholds. What I normally do is go to whoever is making up the vanity top and have them make the shower pieces out of the same material. Then I can get them made out of whatever. Costs a little more, but it's worth it when it draws everything together. Makes it look like it was planned from the start.

Same thing here, Bill......