What is the tallest breed of dog?

The great dane can reach heights of 34 inches or more, taller than any other breed of dog on average, according to the Conservation Institution. The record height for a great dane is 44 inches tall.

The Irish wolfhound is a close second and reaches a height anywhere between 30 and 35 inches, but is a lighter weight dog ranging between 105 and 125 pounds, while great danes typically weigh between 100 and 200 pounds. Additionally, great danes have an athletic build defined by muscle and long, lean limbs. Males are typically a couple inches taller than females and will weigh 30 pounds more on average.