Built for vehicle sizing in the Personal Property system. Where the VIN does not decide a variant, the answer says so and lists what would decide it. Nothing is estimated.
Rule zero: the service never fabricates a number. Every dimension carries a provenance tag and a source that resolves in the dataset record. A missing value is absent, with a reason. If several catalogued variants survive, they are returned as candidates with the attributes that separate them, never a silent default to the smallest.