The Irish Wolfhound, Great Dane, Saint Bernard, Bernese and Greater Swiss Mountain dogs, and Newfoundlands are six gentle giant dogs that can adapt well to many different types of families. These big dogs range from about 28 to 35 inches tall at the shoulder.

The Newfoundland tops out at 28 inches at the shoulders, weighs up to 150 pounds and is a working dog that doesn't mind children climbing all over it and pulling on ears. Greater Swiss Mountain dogs also stand around 28 inches at the shoulder, while the Bernese is slightly shorter and has longer hair. Both require a lot of activity and benefit from good training, and they are very sweet and enjoy the company of family. A Saint Bernard can top the scale at up to 200 pounds, but these dogs have been bred for a gentle disposition for centuries. With longer hair, the Saint Bernard requires plenty of grooming and, as with all large dogs, requires plenty of room to exercise and run. Great Danes can measure up to 32 inches at the shoulder and weigh up to 140 pounds. They are extremely lovable and loving, but they need to be trained well to prevent destructive behavior. The Irish Wolfhound is the tallest breed at up to 35 inches at the shoulder. Requiring lots of play, Irish Wolfhounds are an even-tempered, calm and affectionate breed.