This weathered hammered bar copper sink is a beautiful piece of art, the rim is flat (1 wide), allowing it to be undermounted, the bowl is 16" x 16" and is rounded in the corners. From a copper sheet the wise artisan hands transform it into this unique piece. The bar copper sink you are looking at has a standard 3.75" diameter hole that fits a 3.5" standard drainage system. The copper sheet is 14 gauge (0.064" thickness). 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.Hammering the red-hot copper is an ancient technique the coppersmiths use, where no sophisticated tools are used, just the furnace to heat the copper and a hammer to give it the shape. We got this bathroom copper sink from the skilled coppersmiths from Santa Clara del Cobre, Mexico. The finish is in a weathered-looking copper color. It will add a unique home accent making it a very special point of attraction in your kitchen."