The Saint Bernard is a large breed of working dog that originated in the Swiss Alps. They are large dogs, with a length of around 28 to 30 inches and a height of around 27 to 35 inches. They have a thick, long coat that can be any combination of colours, including red, white, and brown, and a sturdy, muscular build.

Saint Bernards are known for being intelligent, loyal, and affectionate. They are protective of their owners and are generally good with children, although they may be more suited to households with older children due to their size and energy level. They are generally easy to train and can learn a variety of tricks and commands, but they may require patience and consistent training to overcome stubbornness.

Saint Bernards are moderate maintenance in terms of grooming, as their coats are thick and may shed seasonally. They require regular brushing and occasional baths to maintain their appearance and keep their skin and coat healthy.

Overall, Saint Bernards are a popular choice for families and individuals who are looking for a large, intelligent, and affectionate companion. They are generally good with children and make great therapy dogs due to their calm and friendly nature. They are also known for their athleticism and are often used as working dogs in activities such as carting, drafting, and search and rescue.