The Deutsche Dogge is a very tall breed, the largest recorded dog measuring over 41 inches at the withers. A popular family pet, this breed is very gentle with children and infinitely loyal to its owner. Reserved around strangers, it is neither vicious nor aggressive towards dogs, although uncharacteristic traits exist among the poorly bred specimens. Its intimidating stature makes it a convincing guard dog. Deutsche Dogge is a very intelligent breed which is fairly easy to train and handle, but requires early socialization and responsible ownership, due to its territorial nature and protective instincts. Handsome, refined and elegant, today's German Mastiff is a very affectionate breed, a far cry from the savage hunter of the past. The body is strongly boned and muscular, with long legs, broad shoulders and a long neck. The head is broad and chiseled, having a fairly long and powerful muzzle. The ears can be either cropped or unaltered, but the tail mustn't be docked.

Short-coated, the breed is most often seen in yellow, fawn, black, blue and brindled shades, as well as in the white-based Boston and Harlequin colourings. The average height is around 34 inches, although smaller, as well as taller examples exist.