Despite the name, Great Danes are German, descended from boar hounds kept by German nobility. Those mastiff and greyhound-type crosses produced a tall, square dog with a short coat and an elegant, chiseled head. Males typically stand 30 to 32 inches and weigh 140 to 175 pounds, while females run a little smaller.
Many Danes are gentle, friendly and surprisingly calm indoors, content to lean on their people or sprawl across the sofa, though dogs vary. Their size shapes daily life in a city like DC: food bills, vehicle space, careful puppy growth and stairs all matter. Bloat and heart disease are real risks, and lifespans often run under ten years, so adopters should plan for a shorter but close companionship.