I went to a granite company today but that conversation left my more confused on how big I need to make it. He seemed reluctant to make any kind of recommendation other then "bigger." I also tried the Home Depot, but got nowhere there.
My question is, how much clearance do you need to leave at the back and front of the sink. For example, I'm looking at at rectangular Kohler that has an outside dim of 14 1/4" front to back (12" opening). How big would by vanity need to be?