PolyNiche 12 in. x 16 in. x 3.5 in. Shower Niche with Modular Shelf in Gray NCHS1216 - The Home Depot
GoShelf Experts Explain the Cost of Shower Niche | GoShelf
eModernDecor Over Mount Installation 16 in. x 28 in. ABS Single Shelf Bathroom Recessed Shower Niche for Shampoo, Toiletry Storage SHC-R-1628 - The Home Depot