SimplyCopper 15" Mexican Square Copper Kitchen Bar Prep Sink SimplyCopper 15" stylish bar and prep copper sink is designed for everyday living. This Bar/prep sink is designed to be the perfect size for any kitchen design. Handmade from 18-Gauge copper this sink is designed to last . Installed as a drop-in or under-mount. Dimensions (lip to lip): 15" x 15" / Dimensions (inside): 13" x 13" / Depth: 7" (not a true geometric square) Drain Opening: US standard 3-1/2" Not Included 18 Gauge Copper Shown in Aged Copper Installation: Flat Edge for Drop In or Undermont Installation