The copper sheet gauge on this copper sink is 16. This bathroom copper sink has a standard 1.5 diameter hole and it does not have an overflow system. It is intended to be over-mounted, with a 1.5" rim around it, except in the back where is 4" wide, to allow the faucet mounting. The inside dimensions are 19" x 12 11/16" x 7". The finish is dark brown, weathered copper. It will definitely add a unique accent to your bathroom making it a very special focal point for you and your visitors. It has pre-drilled the three faucet holes at 1.25" each."