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. From a copper sheet the wise artisan hands transform it into this unique piece. The hammer footprint is very visible and the decorations are embossed out the main copper sink body. The reddish/oxidized texture is characteristic of natural copper when it is cooled down from red-hot temperature using cold water, technique that the copper-smiths use. The finish is in a dark brownish, weathered color. Suitable for your bathroom, it will add a unique home accent making it a very special point of attraction in your bathroom. The copper sheet is 16 gauge (0.05" thickness).IMPORTANT NOTE: The patina can be damaged faster if toothpaste stays for long periods of time on the sink surface, because of this, washing it after brushing teeth is recommended."