Tile Redi RNT166S-14-20 Triple Niche Set containing (1) RN166S-BI 16" W x 6" H x 4" D Single Niche, (1) RN1614S-BI 16" W x 14" H x 4" D Single Niche, and (1) RN1620S-BI 16" W x 20" H x 4" D Single Niche (1) 16x6 Single Niche, (1) 16x14 Single Niche, and (1) 16x20 Single Niche shipped in separate boxes Dimensions (if installed as shown): 16" W x 40" H x 4" D with shelves 20" H and 34" H Height can be lengthened to allow for your personal preference and/or tiling needs Easy-to-install and Ready-to-Tile, tile set directly on niche surface Water-proof, leak-proof, and mildew-free