The bathroom copper sink you are looking at has a standard 1.5"" diameter hole and it does not have an overflow system. This hammered bathroom copper sink is a beautiful piece of art intended to be under-mounted or dropped-in. The shown dimensions are overall (outside dimensions). The inside dimensions are 10""x10""x6 1/2"". The hammer footprint is very visible. 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. We got this bathroom copper sink from the skilled copper-smiths from Santa Clara del Cobre, Mexico. 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.