Undermount Ceramic Bathroom Sink - Glossy finish

option1

Outside size : 20-3/10"×15"×7-3/10"

inside size : 18-1/10*x12-4/5"

option 2

Outside size: 19-1/2" ×15-1/2" ×6-9/10"

inside size : 17-1/2"×13-4/5"

option 3

Outside size : 18-3/10"×13-3/5"×8-3/10"

inside size : 16-3/10*x11-3/5"

It comes with a 1 3/4" drain opening designed for standard US and Canadian plumbing connections.