This is a nice sink for its age! We suspect this sink is made of fireclay, the texture is a bit coarser than china. It’s intended for undermount or tiled applications, and is in excellent condition. It measures 19 3/4″ wide by 18″ outside diameter, and 16 3/4″ by 15″ on the inside. Depth of basin is 6 1/4″. This sink will take a “normal” Junior basin strainer, and we will throw in the existing drain AS-IS.