This bathroom copper sink has a standard 1.5 diameter hole and it does not have an overflow system. It is designed for over-the-counter mounting because its rim is rounded. The hammer footprint is very visible. The reddish/oxidated texture is characteristic of natural copper when it is cooled down from red-hot temperature using cold water, technique that the coppersmiths use. The finish is in a reddish color. Suitable for your bathroom, it will add a unique home accent making it a focal point in your bathroom. The copper sheet is 16 gauge (0.05" thickness)."