The Saint Bernard has a complete set of evenly spaced, white teeth meeting in a scissors bite. A level bite is acceptable but not preferred. It is desirable for the roof of the mouth to be black. Overshot or undershot bite. The nose is broad with nostrils well open.
Nose leather is black.
In profile, the top of the nose does not rise above the bridge of the muzzle. Nose color other than black. They are set moderately deep and more to the front of the skull than the sides. Each eyelid has a slight fold, causing the eye to have a diamond-shaped appearance. Expression is kindly and intelligent.