He's a mere 23.6 inches tall.
Harbor's owner, Jennifer Wert, says her dog has been mistaken for both a very large rabbit and a very small elephant.
But he's no Dumbo -- just a black and tan coonhound, a breed that's already known for their extremely long ears.
You might think the hunting dogs use their long ears for hearing, but they're actually used for smelling -- the ears flap around and bring scents right into the dog's nose.
You can also find him in the latest edition of Guinness World Records.