If the likely outcomes are that declarer makes either eleven tricks (a five-level contract) or thirteen, this is a five or seven deal.
Assuming the opening lead is a minor, a contract in one of the majors is likely to yield thirteen tricks if the heart finesse works but only eleven if it fails – in the latter case, the defenders score the winner they set up at trick one as well as the ♥K.
A grand slam is the best contract on this type of deal, though this can be hard to diagnose in the auction.