I agree, Niche's are great and have fun with them. I did 2, one is very large and holds lots of stuff but I keep it to a minimum it also doubles as a foot rest when shaving and the other is long and skinny with 4 shelves that are pretty much out of water splash zone. The top shelf is for a stack of wash cloths that are stocked at all times, never will I have to hear the pounding on the walls followed by "Can you bring me a wash cloth?" Next shelf for Face wash like Noxema and 3rd shelf is for his and hers razors the bottom shelf is a bar of soap that sits on a folded clean dry washcloth so that the soap dries nice and no soapy mess to ever clean up. Have fun with it! And build in the organization.

Oh, come on, 4x3 is not small. It is plenty of room - our shower is smaller than that and we have two shelves in one corner. We are not small people horizontally either, as Bill can attest. :-) Get two or even three or four smaller shelves (even 6" on the two flat sides of a quarter-circle shelf gives you enough room for two reasonably-sized bottles of shampoo and conditioner and some small things) that you can fit in next to the shower bar and you should be fine. You could also put a wide (side to side), shallow (front to back) rectangular shelf below the shower controls. A glass shop can cut you a thick tempered-glass shelf with curved front edges so you wouldn't ding yourself on the front corners and provide you with the hardware to install the shelf. A glass shelf with the proper hardware can hold quite a bit - the one I have over the tub usually holds two 16-oz shampoo bottles, a 16-oz pump bottle of shaving lotion, a quart bottle of liquid soap (I keep forgetting to buy a smaller bottle to decant it into), a cup of tea or a Coke, and miscellaneous small sundries like razors, and that's just a cheap one I bought for $15 at Lowes.

That is not marble. It's a poured mold. The weight should not be a issue but it needs to be discussed prior with the installer.

@tartanmeup - checking in to see what you decided re: corner shelves or one longer shelf. I want to add a shelf like you posted in my guest bathroom - on the wall across from the showerhead - out of the spray line (this is a tub/shower combo). If I was doing this in a larger walk-in shower, I would just have a false wall built on the lower part so it would be a ledge. However, it’s a tub/shower combo so that’s not happening. I decided against a niche (for a few different reasons) - decided to just add a few corner shelves since it’s a guest bathroom. HOWEVER, after I saw this, I’ve wanted a shelf: I was told to use Mapei Flexcolor CQ grout in order to avoid any inconsistent color issues. @palimpsest - is your shelf just held by the tiles above/below? Was it custom made for you? Last Q - how thick is it? @laurenn07 - your shower looks nice!