So we have the tile, the paint and the layout finished...but the question is now niches.

Niche one will be visible upon entry to the bathroom, through a glass door and adjacent glass topper to a short pony wall. To the right is the outside shower wall that might clip the visible end of the niche. This niche will be installed in a newly studded area, covering a former bay window, so we have no restrictions on length and height. The niche floor will be granite, matching the counters and shower sill, with a glass mosaic back. The niche will be rectangular or square, the question is how big? It's primary use is decorative vs. storage.

My gut says 3' long and 1' high, starting at about 4' from the shower floor, and 2' from the bench/non-shower head wall (because the bench is below that end for about 18" from the wall). Placing it there will visually clip the end, where using 1' from the bench wall will not cause a visual clip.

The usable niches will be within the totally walled off area of the shower. One idea would be stacking three niches, the top two being 15" tall and 10" wide with the bottom being 6" tall and 10" wide. Optionally, we can compress the spacing a bit by having a single niche with granite shelves, total of 40" tall and 10" wide. Either would be located to the side of the shower head and controls, with the bottom about 30" off the floor.

Alternate idea is split the niches left and right and divide each with a granite shelf, these niches being 22" tall and 10" wide, with the upper total size 15" and the lower being 7" minus the 3cm slab thinkness. This provides four usable niches, but may look a bit noisy/busy, However the bottom of the niches would be at about 42", and probaly more ergonomic. The tile guy would hate four separate niches, but he's getting paid to do whatever, so that's in play too...call it a 15x10 above a 6x10.

Thoughts?