A giant Dog term used for those dog breeds which are very much larger in build and heavy weight and have a tall height. There is no prescribed height or weight has described any book of the breed for the classification of Giant Dogs all extra large dogs come under the umbrella of giant dogs. There is no universal height or weight at which a breed is classified as a giant breed; any very large dogs fall into this category, though some defined "giant breed" based on a certain tallness or heaviness, such as 100 pounds. Although the Giant breeds are raised quickly, but turn to maturity into their full adult size and smaller dogs get maturity very soon. A comprehensive list of Giant breed dog is bellow.