The bathroom copper sink you are looking at 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. This copper sink was made from one sheet of copper, raised with the artist hammer, there are no one welded joints, the lizards are pulled out of the copper sheet itself. The finish is in a light brownish 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).