The 1 Compartment niche is convenient for holding 3-32 oz bottles. We recently supplied a large hospital remodel in Manhattan, NY with 375 of these, they are sanitary. This niche fits in the space of one 12×12 or four 6×6 ceramic tiles with no cuts necessary. Pair this unit up with the 3 Compartment and have plenty of storage for your shower toiletries. Overall size is 12 3/4″ x 12 3/4″ x 4″ Cut out size is 11 3/4″ x 11 3/4″. Ribs of lower shelf have the backs removed so soap doesn’t slide out. Install level in cut out opening using silicone caulk and tape in place with aluminum tape overnight, finish caulk next day. Please consult you tile setter, bathroom contractor or person who is remodeling your shower before purchasing. You Tube “ceramic niche install” Simple Ceramic Niche install video.