Novatto TIS-202 Rainbow Glazed Glass Vessel Bathroom Sink with Textured Exterior, 16.5 Inch Diameter Round rainbow vessel with yellow, blue and brown swirl Made with 3/4-inch high tempered glass; scratch resistant and non-porous Designed for above counter installation and standard U.S. plumbing connections Outer dimensions 16.5 by 5.75-inches tall Made with 1.75-inch drain opening for standard vessel drain