This bathroom copper sink has a standard 1.5"" diameter hole at the bottom center and it does not have an overflow system. It is designed for over-the-counter mounting and the apron sits on top of the counter top, as shown in the third picture. The rim on top is 1.5"" wide and the apron is 1.5"" tall. The hammer footprint is cast by hand. The reddish/oxidized texture is characteristic of natural copper when it is cooled down from red-hot temperature using cold water, technique in use by the copper-smiths.The finish is in a dark 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).