Gebal Vitreous China Vessel SinkThe round shape of this sink is optimal for most applications and the quality of the vitreous china itself top notch. Unlike many vessel sinks, this particular basin features a pre drilled overflow hole. Overall Dimensions: 17 1 2" Diameter x 6 1 2" H ( 1 2") Interior Dimensions: 15 3 8" Diameter ( 1 2") 4 3 4" Basin Depth (3 7 8" Depth to Overflow) Vitreous China Construction Pre Drilled Overflow Hole Drain Not Included (Accepts Standard 1 1 2"