XVL Bathroom Tub Pop Up Drain Stopper with Overflow 2 Pieces, Nickel Brushed D39A-2 This is a small size drain.Please check the second and the sixth image and make sure this product is fit for your basin or sink Diameter of the mounting hole should be from 1.6 inch to 1.9 inch(The third image is the installation instruction) Thickness of the mounting hole should less than 1.7 inch Please check the size of the sink hole and make sure the Porcelain Sink with an overflow hole Easy to install.make sure the Porcelain Sink with an overflow hole