1)Granite Vanity top (or Marble Countertop) size:

 

Cut-out for undermount and pre-drilled holes for faucet.

 

25"x19", 25"x22", 31"x19", 31"x22", 37"x19", 37"x22", 49"x19", 49"x22", 61"x19", 61"x22" and other sizes as per your request.